Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149663
Ching-Chuan Su
{"title":"A simple evaluation of some improper integrals for dyadic Green's function","authors":"Ching-Chuan Su","doi":"10.1109/APS.1986.1149663","DOIUrl":"https://doi.org/10.1109/APS.1986.1149663","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121218688","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149734
K. Rao, A. Chakraborty, B. Das
ain s t a r t i n g p a t t e r n . A u n i f o r m a p e r t u r e e x c i t a t i o n r e s u l t i n g a n a r r o w beam w i th 13 dB f i r s t s i d e l o b e l e v e l , e t c . was t a k e n o n s t a r t i n g p a t t e r n a n d o f p e n c i l beam w i t h a r b i t r a r y s i d e l o b e c o n f i g u r a t i o n , b o t h s y m m e t r i c a s E e l 1 a s a s y m m e t r i c s i d e l o b e , was r e a l i s ad. E l l i o t t f 2 3 a l s o g e n e r a t e d n a r r o w beam w i t h asymmet r ic s ide lobes , whose peaks f i t a p r e s c r i b e d enve lope [ i n h i s c s c 2 p a t t e r n 2 s u b s e q u e n t l y some of t h e z e r o s o n t h e u n i t c i r c l e were s h i f t e d r a d i a l l y o u t w a r d o r i n w a r d t o o b t a i n n u l l f i l l i n g a n d a reaso n a b l y s h a p e d p a t t e r n was ob ta ined .
在 13 dB f i r s t s i d e l o b e l e v e l , e t c .E l l i o t f 2 3 a l s o g e n e r a t e d n a r o w beam w i t h asymmet r ic s ide lobes 、在此基础上，对其进行了重新评估。
{"title":"Modified Elliott's technique for sector beam synthesis","authors":"K. Rao, A. Chakraborty, B. Das","doi":"10.1109/APS.1986.1149734","DOIUrl":"https://doi.org/10.1109/APS.1986.1149734","url":null,"abstract":"ain s t a r t i n g p a t t e r n . A u n i f o r m a p e r t u r e e x c i t a t i o n r e s u l t i n g a n a r r o w beam w i th 13 dB f i r s t s i d e l o b e l e v e l , e t c . was t a k e n o n s t a r t i n g p a t t e r n a n d o f p e n c i l beam w i t h a r b i t r a r y s i d e l o b e c o n f i g u r a t i o n , b o t h s y m m e t r i c a s E e l 1 a s a s y m m e t r i c s i d e l o b e , was r e a l i s ad. E l l i o t t f 2 3 a l s o g e n e r a t e d n a r r o w beam w i t h asymmet r ic s ide lobes , whose peaks f i t a p r e s c r i b e d enve lope [ i n h i s c s c 2 p a t t e r n 2 s u b s e q u e n t l y some of t h e z e r o s o n t h e u n i t c i r c l e were s h i f t e d r a d i a l l y o u t w a r d o r i n w a r d t o o b t a i n n u l l f i l l i n g a n d a reaso n a b l y s h a p e d p a t t e r n was ob ta ined .","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128961123","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149586
J. Ashkenazy, E. Levine, D. Treves
Low pmNe printed antennas are an attractive solution for coniormal appiications. This paper presents design and measured results of two X-band conformal arrays of 4 x 4 printed dipoles. The radiating elements were printed on both sides of a thin and flexible substrate and then wraped around a conducting cylinder of small radius (a % 1.5xo) with a honeycomb spacer (a, % 1, k = 0.15Xo) in between. This structure allows for large bandwidth while minimizing surface-wave and network radiation losses [I]. The dipoles orientation is a x i a l for one antenna (Fig. 1) and azimuthal for the second one (Fig. 2). A theory developed for the analysis of printed antennas on cyIiidricaI bodies 121, [3] was used to maximize the directivity in t of the inter-element spacing. The experimental results including: radiation patterns, gains (17-18 dB) and bandwidths (15-20%) show the ability to achieve broadband arrays with gains and patterns in reasonable agreement with theoretical predictions.
{"title":"Conformal arrays of double-sided printed dipoles","authors":"J. Ashkenazy, E. Levine, D. Treves","doi":"10.1109/APS.1986.1149586","DOIUrl":"https://doi.org/10.1109/APS.1986.1149586","url":null,"abstract":"Low pmNe printed antennas are an attractive solution for coniormal appiications. This paper presents design and measured results of two X-band conformal arrays of 4 x 4 printed dipoles. The radiating elements were printed on both sides of a thin and flexible substrate and then wraped around a conducting cylinder of small radius (a % 1.5xo) with a honeycomb spacer (a, % 1, k = 0.15Xo) in between. This structure allows for large bandwidth while minimizing surface-wave and network radiation losses [I]. The dipoles orientation is a x i a l for one antenna (Fig. 1) and azimuthal for the second one (Fig. 2). A theory developed for the analysis of printed antennas on cyIiidricaI bodies 121, [3] was used to maximize the directivity in t of the inter-element spacing. The experimental results including: radiation patterns, gains (17-18 dB) and bandwidths (15-20%) show the ability to achieve broadband arrays with gains and patterns in reasonable agreement with theoretical predictions.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128742870","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149658
D. Cox
walls, ceilings and objects. Quantitative descriptions of propagation parameters such as time delay spread, attenuation, crosspolarization coupling and various signal correlations are needed to facilitate the design of an efficient and reliable Universal Digital Portable Communications System. Only in recent years have m asurements of these n eded propagation parameters been made. The radio pr pagation environment for Universal Digital Portable Communications will be illustrated using results from recent propagation measurements made within and around houses and buildings.
{"title":"The radio propagation enviroment for universal digital portable communications","authors":"D. Cox","doi":"10.1109/APS.1986.1149658","DOIUrl":"https://doi.org/10.1109/APS.1986.1149658","url":null,"abstract":"walls, ceilings and objects. Quantitative descriptions of propagation parameters such as time delay spread, attenuation, crosspolarization coupling and various signal correlations are needed to facilitate the design of an efficient and reliable Universal Digital Portable Communications System. Only in recent years have m asurements of these n eded propagation parameters been made. The radio pr pagation environment for Universal Digital Portable Communications will be illustrated using results from recent propagation measurements made within and around houses and buildings.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115385390","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149697
G. Greving
The currently increasing demand for all weather landing capabilities (CATIII) requires adapted high performance ILS-Localizer antennas. Antenna nearfield effects and given site circumstances set limitations on the use of very large aperture antennas because site reflections are caused actually by the effective nearfield amplitudes. Results of a realized high performance ILS-Loc-2F antenna are presented.
{"title":"Nearfield and site constraints on the design of high performance ILS-localizer antennas","authors":"G. Greving","doi":"10.1109/APS.1986.1149697","DOIUrl":"https://doi.org/10.1109/APS.1986.1149697","url":null,"abstract":"The currently increasing demand for all weather landing capabilities (CATIII) requires adapted high performance ILS-Localizer antennas. Antenna nearfield effects and given site circumstances set limitations on the use of very large aperture antennas because site reflections are caused actually by the effective nearfield amplitudes. Results of a realized high performance ILS-Loc-2F antenna are presented.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114481931","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149610
D. Bowman
The need for planar phased arrays capable of operating over an octave band with two-plane scan out to 30 deg. has led to fresh ways to array the elements in grids and to suppress the level of peak grating lobes. With these grids the maximum size of the element is set only by considerations of scan loss so the number of elements may be reduced to about a third of that of a conventional triangular grid array with interelement spacings set to avoid grating lobes in array visible space.
{"title":"Broadband low-grating-lobe array grids","authors":"D. Bowman","doi":"10.1109/APS.1986.1149610","DOIUrl":"https://doi.org/10.1109/APS.1986.1149610","url":null,"abstract":"The need for planar phased arrays capable of operating over an octave band with two-plane scan out to 30 deg. has led to fresh ways to array the elements in grids and to suppress the level of peak grating lobes. With these grids the maximum size of the element is set only by considerations of scan loss so the number of elements may be reduced to about a third of that of a conventional triangular grid array with interelement spacings set to avoid grating lobes in array visible space.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115202769","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149655
P. Katehi
An analytical method for the evaluation of mutual coupling in microstrip arrays is discussed. The elements of the array are excited by microstriplines printed on or embedded in the substrate. As an example, the mutual coupling between microstrip dipoles electromagnetically coupled to embedded strip transmission lines is evaluated accurately. The presented method is valid in the millimeter range as weft as at microwave frequencies and does not have any substrate limitations. Also, it accounts for conductor thickness and surface wave excitation. Comparison with experimental results shows excellent agreement.
{"title":"A generalized method for the evaluation of mutual coupling in microstrip arrays","authors":"P. Katehi","doi":"10.1109/APS.1986.1149655","DOIUrl":"https://doi.org/10.1109/APS.1986.1149655","url":null,"abstract":"An analytical method for the evaluation of mutual coupling in microstrip arrays is discussed. The elements of the array are excited by microstriplines printed on or embedded in the substrate. As an example, the mutual coupling between microstrip dipoles electromagnetically coupled to embedded strip transmission lines is evaluated accurately. The presented method is valid in the millimeter range as weft as at microwave frequencies and does not have any substrate limitations. Also, it accounts for conductor thickness and surface wave excitation. Comparison with experimental results shows excellent agreement.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115689122","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149789
J. Hanfling
w i th cu r ren t t heo ry . The performance parameters t h a t were i n volved included element act ive impedance as a func t ion o f scan angle and frequency and corresponding coand c ross-po la r ized embedded element patterns. The performance trends and l i m i t a t ions eventual ly impact the dec is ions on the des ign conf igura t ion such as s ing le or dual probes, subst rate mater ia l , patch height and dimensions, l a t t i c e spacing, and probe feed and matching network.
{"title":"Experimental results illustrating performance limitations and design tradeoffs in probe-fed microstrip-patch element phased arrays","authors":"J. Hanfling","doi":"10.1109/APS.1986.1149789","DOIUrl":"https://doi.org/10.1109/APS.1986.1149789","url":null,"abstract":"w i th cu r ren t t heo ry . The performance parameters t h a t were i n volved included element act ive impedance as a func t ion o f scan angle and frequency and corresponding coand c ross-po la r ized embedded element patterns. The performance trends and l i m i t a t ions eventual ly impact the dec is ions on the des ign conf igura t ion such as s ing le or dual probes, subst rate mater ia l , patch height and dimensions, l a t t i c e spacing, and probe feed and matching network.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689265","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149810
A. Elsherbeni, M. Hamid
In this paper we show that the use of the method of moments [l] together with the exact solution for the scattering by a single scatterer can be combined to produce an efficient solution for the scattering by multiple bodies without any restriction. The total scattered field is divided into two components, namely a non-interaction term and a term due to all interactions between the scatterers. The non-interaction term is expressed exactly, whereas the interaction field is evaluated using the ordinary method of moments. The method is applied here to two circular conducting cylinders although it can be employed for any arbitrary number of cylinders.
{"title":"An improved moment method for the scattering by large conducting cylinders","authors":"A. Elsherbeni, M. Hamid","doi":"10.1109/APS.1986.1149810","DOIUrl":"https://doi.org/10.1109/APS.1986.1149810","url":null,"abstract":"In this paper we show that the use of the method of moments [l] together with the exact solution for the scattering by a single scatterer can be combined to produce an efficient solution for the scattering by multiple bodies without any restriction. The total scattered field is divided into two components, namely a non-interaction term and a term due to all interactions between the scatterers. The non-interaction term is expressed exactly, whereas the interaction field is evaluated using the ordinary method of moments. The method is applied here to two circular conducting cylinders although it can be employed for any arbitrary number of cylinders.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126875949","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149707
E. Chang, S. Long, W. Richards
{"title":"The resonant frequency of electrically thick rectangular microstrip antennas","authors":"E. Chang, S. Long, W. Richards","doi":"10.1109/APS.1986.1149707","DOIUrl":"https://doi.org/10.1109/APS.1986.1149707","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123377216","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}
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