首页 > 最新文献

1978 IEEE International Symposium on Electromagnetic Compatibility最新文献

英文 中文
Interactive Graphics for EMC Analysis 用于EMC分析的交互式图形
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566877
M. Vuille, S. Kubina, H. Widmer
{"title":"Interactive Graphics for EMC Analysis","authors":"M. Vuille, S. Kubina, H. Widmer","doi":"10.1109/ISEMC.1978.7566877","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566877","url":null,"abstract":"","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121476538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Corrosion Effects on Field Penetration Through Apertures 腐蚀对电场穿透孔径的影响
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566836
G. Kunkel
The penetration of electromagnetic fields through an aperture caused by the faying join of a door or cover in a shielded barrier is dependent upon the conductivity of the join and the size of the aperture. It is common practice to plate the faying surfaces and place an EMI gasket between the joining sur­ faces to increase the conductivity and reduce the effective aperture of the join. In selecting the plating and gasket materials, corrosion control is usually of utmost concern, where the corrosion of concern is usually that which causes deterioration of the structure (i.e., oxidation of the base material). Oxi­ dation of the plating and gasket material can, however, cause the conductivity of the join to increase significantly. As a result, the penetration of electromagnetic fields through the aperture can increase with time as oxi­ dation of the platings and gasket material take place.
由屏蔽屏障中门或罩的接合处引起的电磁场穿透孔径取决于接合处的导电性和孔径的大小。通常的做法是在连接表面上镀板并在连接表面之间放置EMI垫片以增加导电性并减小连接的有效孔径。在选择电镀和衬垫材料时,腐蚀控制通常是最重要的,其中所关注的腐蚀通常是导致结构恶化(即基材氧化)的腐蚀。然而,镀层和衬垫材料的氧化会使接头的导电性显著增加。结果表明,随着镀层和衬垫材料的氧化,电磁场通过孔径的穿透会随着时间的推移而增加。
{"title":"Corrosion Effects on Field Penetration Through Apertures","authors":"G. Kunkel","doi":"10.1109/ISEMC.1978.7566836","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566836","url":null,"abstract":"The penetration of electromagnetic fields through an aperture caused by the faying join of a door or cover in a shielded barrier is dependent upon the conductivity of the join and the size of the aperture. It is common practice to plate the faying surfaces and place an EMI gasket between the joining sur­ faces to increase the conductivity and reduce the effective aperture of the join. In selecting the plating and gasket materials, corrosion control is usually of utmost concern, where the corrosion of concern is usually that which causes deterioration of the structure (i.e., oxidation of the base material). Oxi­ dation of the plating and gasket material can, however, cause the conductivity of the join to increase significantly. As a result, the penetration of electromagnetic fields through the aperture can increase with time as oxi­ dation of the platings and gasket material take place.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122466970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Naval Electromagnetic System Design and Synthesis 海军电磁系统设计与综合
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566872
J. Birken
{"title":"Naval Electromagnetic System Design and Synthesis","authors":"J. Birken","doi":"10.1109/ISEMC.1978.7566872","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566872","url":null,"abstract":"","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128380430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Asymmetric versus Symmetric TEM Cells for EMI Measurements 用于电磁干扰测量的非对称与对称TEM单元
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566855
M. Crawford, J. Workman
This paper d i s c u s s e s th e o p t io n o f d e s ig n in g a tr a n s v e r s e e le c tr o m a g n e t ic (TEM) tr a n sm is s io n c e l l w ith an o f f s e t septum a s a m u lt ip u rp o se chamber fo r perform ing e le c tr o m a g n e t ic in t e r f e r e n c e (EMI) measure­ m ents. The d e s ig n and e l e c t r i c a l performance charac ­ t e r i s t i c s o f such a c e l l are g iv e n and compared w ith a s im i la r s i z e d symmetric c e l l .
This paper d s c u s和s th或p t我n d或f和s gl g rs a号s v n和r s和rs和c o m a n和t ic (TEM) rs no sm is s我no c和w ith an s和t或f septum a s m u lt ip u rp荷兰国际集团(ing)或如果fo r perform商会和c tr或m a n和t ic号t和r f和r和c和度量(EMI) - m ents。The d和l gl e n a和c t c l表演charac c s - t和r s t或f are such a c和l g iv号和和目标6 w ith s公司r s z e d symmetric c和l。
{"title":"Asymmetric versus Symmetric TEM Cells for EMI Measurements","authors":"M. Crawford, J. Workman","doi":"10.1109/ISEMC.1978.7566855","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566855","url":null,"abstract":"This paper d i s c u s s e s th e o p t io n o f d e s ig n in g a tr a n s v e r s e e le c tr o m a g n e t ic (TEM) tr a n sm is s io n c e l l w ith an o f f s e t septum a s a m u lt ip u rp o se chamber fo r perform ing e le c tr o m a g n e t ic in t e r f e r e n c e (EMI) measure­ m ents. The d e s ig n and e l e c t r i c a l performance charac ­ t e r i s t i c s o f such a c e l l are g iv e n and compared w ith a s im i la r s i z e d symmetric c e l l .","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129509208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Lightning Protection with Segmented Diverters 分段导流器防雷
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566854
J. Plumer, L. Hoots
Segmented d i v e r t e r s a r e d e s i g n e d t o p r o t e c t radomes and o t h e r d i e l e c t r i c s t r u c t u r e s a g a i n s t punc ­ t u r e f rom d i r e c t l i g h t n i n g s t r i k e s . Radar t r a n s p a r e n c y , l i g h t w e i g h t and e a s e o f a p p l i c a t i o n have c r e a t e d much i n t e r e s t i n t h e s e d i v e r t e r s . S e v e r a l t e s t s e r i e s were pe rform ed t o o b t a i n d a t a f o r u se i n a p p l i c a t i o n . I t was l e a r n e d t h a t t im e t o f l a s h o v e r i s 0 . 7 p s p e r m e t e r o f s t r i p l e n g t h and i s i n d e p e n d e n t o f r a t e o f r i s e w i th ­ i n t h e r a n g e o f r a t e s t h o u g h t t o be t y p i c a l o f l i g h t ­ n i n g . P r o t e c t i o n e f f e c t i v e n e s s s t ems from t h i s s h o r t f l a s h o v e r t im e as compared w i th t h a t f o r a i r o r s o l i d d i e l e c t r i c s . Segmented d i v e r t e r f l a s h o v e r v o l t a g e i s d e p e n d e n t on s t r i p l e n g t h and r a t e o f v o l t a g e r i s e , w i t h f l a s h o v e r o c c u r r i n g a t 500 kV/m when t e s t e d a t t h e cus to mary 1 , 00 0 kV/us r a t e . T e s t s t o d e t e r m i n e s p a c in g r e q u i r e d t o p r e v e n t p u n c t u r e o f a radome wa l l w i t h an a n t e n n a beh in d i t a r e d e s c r i b e d . 30 cm sp a c in g was r e q u i r e d f o r a n t e n n a t o w a l 1 c l e a r a n c e o f 1 . 5 cm b u t d i v e r t e r s may be p l a c e d up t o 60 cm a p a r t i f t h e a n t e n n a i s 15 cm f rom t h e w a l l . A s u c c e s s f u l i n f l i g h t s t r i k e t o an a r r a n g e m e n t based on t h i s d a t a i s d e s ­ c r i b e d .
分段式雷达天线罩和其他雷达系统。Radar t r a n s p a r e n c y , l i g h t w e i g h t a n d e a s e o f a p p l i c a t i o n h a c r e a t e d i t h e s e d i v e r t e r s .我发现你们的时间跨度为 0 .7 p s p e r m e t e r o f s t r i p l e n g t h i s i n d e p e n d e n t o f r i s e w i t h i t h e r a n g e o f t h e s t h o u g h t h e b e t y p i c a l o f l i g h t n i g .与前者相比,后者在时间上更有优势。当电压为 1 , 00 0 kV/us 时,当电压为 500 kV/m 时,分段放电对电压的影响为 1 , 00 0 kV/us 。对雷达天线罩内的 30 厘米间距进行了测量。30 cm sp a c in g was r e q u i r e d f o r a n t e n a t o w a l 1 c l e a r a n c e o f 1 .5 cm,但如果距离水域 15 cm,则水域的深度可达 60 cm。在此基础上,可根据实际情况进行调整。
{"title":"Lightning Protection with Segmented Diverters","authors":"J. Plumer, L. Hoots","doi":"10.1109/ISEMC.1978.7566854","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566854","url":null,"abstract":"Segmented d i v e r t e r s a r e d e s i g n e d t o p r o t e c t radomes and o t h e r d i e l e c t r i c s t r u c t u r e s a g a i n s t punc ­ t u r e f rom d i r e c t l i g h t n i n g s t r i k e s . Radar t r a n s p a r e n c y , l i g h t w e i g h t and e a s e o f a p p l i c a t i o n have c r e a t e d much i n t e r e s t i n t h e s e d i v e r t e r s . S e v e r a l t e s t s e r i e s were pe rform ed t o o b t a i n d a t a f o r u se i n a p p l i c a t i o n . I t was l e a r n e d t h a t t im e t o f l a s h o v e r i s 0 . 7 p s p e r m e t e r o f s t r i p l e n g t h and i s i n d e p e n d e n t o f r a t e o f r i s e w i th ­ i n t h e r a n g e o f r a t e s t h o u g h t t o be t y p i c a l o f l i g h t ­ n i n g . P r o t e c t i o n e f f e c t i v e n e s s s t ems from t h i s s h o r t f l a s h o v e r t im e as compared w i th t h a t f o r a i r o r s o l i d d i e l e c t r i c s . Segmented d i v e r t e r f l a s h o v e r v o l t a g e i s d e p e n d e n t on s t r i p l e n g t h and r a t e o f v o l t a g e r i s e , w i t h f l a s h o v e r o c c u r r i n g a t 500 kV/m when t e s t e d a t t h e cus to mary 1 , 00 0 kV/us r a t e . T e s t s t o d e t e r m i n e s p a c in g r e q u i r e d t o p r e v e n t p u n c t u r e o f a radome wa l l w i t h an a n t e n n a beh in d i t a r e d e s c r i b e d . 30 cm sp a c in g was r e q u i r e d f o r a n t e n n a t o w a l 1 c l e a r a n c e o f 1 . 5 cm b u t d i v e r t e r s may be p l a c e d up t o 60 cm a p a r t i f t h e a n t e n n a i s 15 cm f rom t h e w a l l . A s u c c e s s f u l i n f l i g h t s t r i k e t o an a r r a n g e m e n t based on t h i s d a t a i s d e s ­ c r i b e d .","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129473196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
A Hazard Assessment Method for the U.S. Army Microwave Radiation Protection Program 美国陆军微波辐射防护计划的危害评估方法
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566826
E. Carl
A combination of assessment of hazard potential by analysis and measurement by experienced antenna engineers, and implementation of recommendations made by the U.S. Army Environmental Hygiene Agency (USAEHA) is the backbone of the Army Microwave Radiation Protection Program. Primary responsibility for establishing safety criteria and recommending controls is assigned to USAEHA. By establishing radiation protection programs based on the Agency's recommendations, commanders have sought to comply with the Army's regulations and protect their personnel from continuous exposure to microwave power density levels in excess of 10 mW/cm2, or any exposure to greater than 100 mW/cm2; the current U.S. Standard. Following the Federal Standard, the Army controls exposure from frequencies of 10 MHz and up. Sources include radar, communication equipment, physical therapy RF and microwave diathermy, industrial induction heaters, and microwave ovens and cooking devices.
由经验丰富的天线工程师通过分析和测量对潜在危害进行评估,并实施美国陆军环境卫生署(USAEHA)提出的建议,这是陆军微波辐射防护计划的支柱。建立安全标准和建议控制措施的主要责任被分配给USAEHA。通过根据该机构的建议建立辐射防护计划,指挥官已经寻求遵守陆军的规定,并保护其人员免受持续暴露于超过10兆瓦/平方厘米的微波功率密度水平,或任何大于100兆瓦/平方厘米的暴露;现行的美国标准。按照联邦标准,陆军控制10兆赫及以上频率的辐射。来源包括雷达,通信设备,物理治疗射频和微波透热,工业感应加热器,微波炉和烹饪设备。
{"title":"A Hazard Assessment Method for the U.S. Army Microwave Radiation Protection Program","authors":"E. Carl","doi":"10.1109/ISEMC.1978.7566826","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566826","url":null,"abstract":"A combination of assessment of hazard potential by analysis and measurement by experienced antenna engineers, and implementation of recommendations made by the U.S. Army Environmental Hygiene Agency (USAEHA) is the backbone of the Army Microwave Radiation Protection Program. Primary responsibility for establishing safety criteria and recommending controls is assigned to USAEHA. By establishing radiation protection programs based on the Agency's recommendations, commanders have sought to comply with the Army's regulations and protect their personnel from continuous exposure to microwave power density levels in excess of 10 mW/cm2, or any exposure to greater than 100 mW/cm2; the current U.S. Standard. Following the Federal Standard, the Army controls exposure from frequencies of 10 MHz and up. Sources include radar, communication equipment, physical therapy RF and microwave diathermy, industrial induction heaters, and microwave ovens and cooking devices.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116685663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measurements of the HF Radio Noise Environment in Arctic Canada 加拿大北极地区高频无线电噪声环境测量
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566885
W. Lauber, C. Pike
Measurements of the HF radio noise environment were made at Alert and Inuvik in the Canadian Arctic in 1977. The measurements were taken in the 8:0012:00 hour and 20:00-24:00 hour local standard time periods. The Alert measurements were taken in June, a period of total daylight. The Inuvik measurements were taken in October when the 20:00-24:00 hour data period occurred after sunset. The results of the night measurements at both sites compared favourably with the CCIR predictions and the day results showed that the Quiet Receiving Site Line, used in the South, was an accurate prediction at Inuvik but it predicted levels too high at the quiet location at Alert. The measurements taken in the town of Inuvik showed higher levels of man-made noise that were comparable to a "rural location" as defined in CCIR Report 258. Measurements at these high latitude sites revealed limitations in the sensitivity of the measuring equip­ ment . where 10 log f
1977年在加拿大北极的阿勒特和伊努维克对高频无线电噪声环境进行了测量。测量时间为当地标准时间8:00 - 12:00和20:00-24:00。“警报”的测量是在6月进行的,那是一段完全白天的时间。Inuvik测量是在10月份的20:00-24:00小时数据周期发生在日落之后进行的。在两个地点的夜间测量结果与CCIR的预测结果相比较,白天的结果表明,在南部使用的安静接收点线在Inuvik是一个准确的预测,但它在Alert安静地点预测的水平太高了。在Inuvik镇进行的测量显示,人造噪音水平较高,与CCIR报告258中定义的“农村地区”相当。在这些高纬度地点的测量显示了测量设备灵敏度的局限性。这里是10logf
{"title":"Measurements of the HF Radio Noise Environment in Arctic Canada","authors":"W. Lauber, C. Pike","doi":"10.1109/ISEMC.1978.7566885","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566885","url":null,"abstract":"Measurements of the HF radio noise environment were made at Alert and Inuvik in the Canadian Arctic in 1977. The measurements were taken in the 8:0012:00 hour and 20:00-24:00 hour local standard time periods. The Alert measurements were taken in June, a period of total daylight. The Inuvik measurements were taken in October when the 20:00-24:00 hour data period occurred after sunset. The results of the night measurements at both sites compared favourably with the CCIR predictions and the day results showed that the Quiet Receiving Site Line, used in the South, was an accurate prediction at Inuvik but it predicted levels too high at the quiet location at Alert. The measurements taken in the town of Inuvik showed higher levels of man-made noise that were comparable to a \"rural location\" as defined in CCIR Report 258. Measurements at these high latitude sites revealed limitations in the sensitivity of the measuring equip­ ment . where 10 log f","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127121431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Broadband Null-Steering for Signal-Matched Antenna Arrays 信号匹配天线阵列的宽带零转向
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566891
D. Cheng, F. Tseng
A method for creating and steering a pattern null for a broadband signal-matched array antenna is discussed. This null-steering capability is of great importance in avoiding interference and jamming. Typical pattern responses to impulse noise are given and transient effects are examined. Introduction An important advantage of an array antenna sys­ tem over a reflector antenna is the former's ability to create a pattern null in a specified direction. This null-steering capability is of great value in a jamming environment and in locations where unwanted interfering signals may exist. Adaptive control net­ works can be designed to steer the nulls of a CW single-frequency array onto jamming and/or interfer­ ing sources on a real-time basis so that the proba­ bility of detecting the desired signal is enhanced.^ However, little information is available on the feasibility of null-steering for broadband operations for which narrow-band filters and phase-shifters will not suffice. This paper proposes a method for cre­ ating and steering a pattern null for a linear array with a matched filter which is designed to match radar pulses with a linear frequency modulation. The basic principle lies in the use of doublet elements. Each doublet consists of two elements separated by an appropriate distance. The output of one of the elements is delayed in time before it is combined with that of the other in order to create a null in the array pattern. A jamming interference impinging on the array at the designed null direction will yield no output under ideal conditions. The null direction can be relocated by changing the time delay between the elements of the doublets. Typical array patterns in response to an impulse noise are plotted for a signal-matched Chebyshev array consist­ ing of 40 doublet elements in the transient state. Linear Array with Matched Filter Consider a linear array of 2N isotropic elements spaced at distances + x^, +"X2 >..., + from the array center 0, as shown in Fig. 1. The array is in a receiving mode with amplitude weighting factors I , n = + 1, +2,..., + N. The incoming signal s(t) is assumed to have a rectangular frequency spectrum centered at w with a bandwidth 2yw and the transfer o o function, H(jw), of the matched filter is the complex conjugate of signal spectrum S(jw). The time delays, T , are provided to steer the mainbeam direction of n the array pattern. If the signal is a pulse with a linear frequency modulation, we have In Eq. (1), to + (J) . . H(jto) = S*(jco) = Rect ( 2 ■ °)e~~|Ct ' o Rect (y) = l , f < y <
讨论了一种用于宽带信号匹配阵列天线的模式空的创建和操纵方法。这种零转向能力对避免干扰和干扰具有重要意义。给出了脉冲噪声下典型的模式响应,并检验了瞬态效应。阵列天线系统相对于反射天线的一个重要优点是阵列天线能够在指定方向上产生方向图零。这种零转向能力在干扰环境和可能存在不必要干扰信号的位置非常有价值。自适应控制网络可以设计成实时地将连续波单频阵列的零点引导到干扰和/或干扰源上,从而提高检测所需信号的概率。^然而,关于窄带滤波器和移相器不足以满足宽带操作的零转向可行性的资料很少。本文提出了一种具有匹配滤波器的线性阵列的零方向图产生和控制方法,该滤波器设计用于匹配具有线性调频的雷达脉冲。基本原理在于使用重态元素。每个重态由两个元素组成,它们之间有适当的距离。其中一个元素的输出在与另一个元素的输出组合之前被延迟,以便在数组模式中创建null。在理想情况下,在设计零方向上对阵列产生的干扰不会产生输出。可以通过改变双元组元素之间的时间延迟来重新定位零方向。本文绘制了由40个瞬态双元组成的信号匹配切比雪夫阵列在脉冲噪声作用下的典型阵型。考虑一个由2N个各向同性元素组成的线性阵列,它们的间距为+ x^, +“X2 >…”, +从阵列中心0开始,如图1所示。阵列处于振幅加权因子I, n = + 1, +2,…的接收模式。假设输入信号s(t)具有以w为中心的矩形频谱,带宽为2yw,匹配滤波器的传递函数H(jw)是信号频谱s(jw)的复共轭。提供时间延迟T来引导n阵列方向图的主波束方向。如果信号是一个线性调频的脉冲,我们有式(1),到+ (J)。H (jto) = S * (jco) =矩形(2■°)e ~ ~ | Ct ' o矩形(y) = l f < y <
{"title":"Broadband Null-Steering for Signal-Matched Antenna Arrays","authors":"D. Cheng, F. Tseng","doi":"10.1109/ISEMC.1978.7566891","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566891","url":null,"abstract":"A method for creating and steering a pattern null for a broadband signal-matched array antenna is discussed. This null-steering capability is of great importance in avoiding interference and jamming. Typical pattern responses to impulse noise are given and transient effects are examined. Introduction An important advantage of an array antenna sys­ tem over a reflector antenna is the former's ability to create a pattern null in a specified direction. This null-steering capability is of great value in a jamming environment and in locations where unwanted interfering signals may exist. Adaptive control net­ works can be designed to steer the nulls of a CW single-frequency array onto jamming and/or interfer­ ing sources on a real-time basis so that the proba­ bility of detecting the desired signal is enhanced.^ However, little information is available on the feasibility of null-steering for broadband operations for which narrow-band filters and phase-shifters will not suffice. This paper proposes a method for cre­ ating and steering a pattern null for a linear array with a matched filter which is designed to match radar pulses with a linear frequency modulation. The basic principle lies in the use of doublet elements. Each doublet consists of two elements separated by an appropriate distance. The output of one of the elements is delayed in time before it is combined with that of the other in order to create a null in the array pattern. A jamming interference impinging on the array at the designed null direction will yield no output under ideal conditions. The null direction can be relocated by changing the time delay between the elements of the doublets. Typical array patterns in response to an impulse noise are plotted for a signal-matched Chebyshev array consist­ ing of 40 doublet elements in the transient state. Linear Array with Matched Filter Consider a linear array of 2N isotropic elements spaced at distances + x^, +\"X2 >..., + from the array center 0, as shown in Fig. 1. The array is in a receiving mode with amplitude weighting factors I , n = + 1, +2,..., + N. The incoming signal s(t) is assumed to have a rectangular frequency spectrum centered at w with a bandwidth 2yw and the transfer o o function, H(jw), of the matched filter is the complex conjugate of signal spectrum S(jw). The time delays, T , are provided to steer the mainbeam direction of n the array pattern. If the signal is a pulse with a linear frequency modulation, we have In Eq. (1), to + (J) . . H(jto) = S*(jco) = Rect ( 2 ■ °)e~~|Ct ' o Rect (y) = l , f < y < ","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130758987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Review of Electromagnetic Diffraction by Small Apertures in Conducting Surfaces 导电表面小孔径电磁衍射研究进展
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566834
C. Butler
Simple methods for computing electromagnetic dif­ fraction by small apertures in conducting surfaces are reviewed, with an attempt to present the concepts tutorially so that this body of knowledge is rendered accessible to practicing engineers. Representation of the field diffracted by a small aperture in a screen by means of equivalent dipoles is discussed and salient properties of the associated aperture polarizabilities are outlined.
简单的方法计算电磁衍射分数的小孔径在导电表面进行审查,并试图提出的概念教程,使这一知识体系呈现易于访问的执业工程师。讨论了用等效偶极子表示屏幕上小孔径衍射的场,并概述了相关孔径极化率的显著性质。
{"title":"A Review of Electromagnetic Diffraction by Small Apertures in Conducting Surfaces","authors":"C. Butler","doi":"10.1109/ISEMC.1978.7566834","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566834","url":null,"abstract":"Simple methods for computing electromagnetic dif­ fraction by small apertures in conducting surfaces are reviewed, with an attempt to present the concepts tutorially so that this body of knowledge is rendered accessible to practicing engineers. Representation of the field diffracted by a small aperture in a screen by means of equivalent dipoles is discussed and salient properties of the associated aperture polarizabilities are outlined.","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124351362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Prediction of Crosstalk Involving Twisted Pairs of Wires a Simplified, Low Frequency Prediction Model 双绞线串扰的预测——简化的低频预测模型
Pub Date : 1978-06-20 DOI: 10.1109/ISEMC.1978.7566823
C. Paul, J. McKnight
A simplified model for predicting crosstalk invol­ ving twisted wire pairs which is valid for low fre­ quencies is developed. The total coupling is separated into inductive and capacitive coupling contributions. The capacitive coupling contribution is shown to pro­ vide a "floor" which limits the effect of reducing the inductive coupling achieved by twisting a wire pair. These contributions are computed from Fig. 2 where and Cjj are the mutual inductance and capacitance, re­ spectively, between the two circuits, and Igpg and Vqjjq are the generator circuit current and voltage, respec­ tively, which are Computed for zero frequency of excita­ tion [2 ].
提出了一种适用于低频的简化的双绞线串扰预测模型。总耦合分为电感耦合和电容耦合两部分。电容耦合的贡献提供了一个“底限”,它限制了通过扭转导线对来减小电感耦合的效果。这些贡献从图2中计算出来,其中和Cjj分别是两个电路之间的互感和电容,Igpg和Vqjjq分别是发电机电路的电流和电压,它们是在零频率激励[2]时计算出来的。
{"title":"Prediction of Crosstalk Involving Twisted Pairs of Wires a Simplified, Low Frequency Prediction Model","authors":"C. Paul, J. McKnight","doi":"10.1109/ISEMC.1978.7566823","DOIUrl":"https://doi.org/10.1109/ISEMC.1978.7566823","url":null,"abstract":"A simplified model for predicting crosstalk invol­ ving twisted wire pairs which is valid for low fre­ quencies is developed. The total coupling is separated into inductive and capacitive coupling contributions. The capacitive coupling contribution is shown to pro­ vide a \"floor\" which limits the effect of reducing the inductive coupling achieved by twisting a wire pair. These contributions are computed from Fig. 2 where and Cjj are the mutual inductance and capacitance, re­ spectively, between the two circuits, and Igpg and Vqjjq are the generator circuit current and voltage, respec­ tively, which are Computed for zero frequency of excita­ tion [2 ].","PeriodicalId":377995,"journal":{"name":"1978 IEEE International Symposium on Electromagnetic Compatibility","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115496824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
期刊
1978 IEEE International Symposium on Electromagnetic Compatibility
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1