Dual Frequency Filtenna with TE102 and Hybrid TE202 Mode for 5G mmWave N258/N260 Applications

A dual frequency filtenna (filtering antenna) for the fifth generation (5G) millimeter wave (mmWave) applications is proposed. The proposed antenna with a size of 6×6mm consists of a rectangle patch and a substrate integrated waveguide (SIW) cavity. The resonant mode in SIW cavity are TE102 (for N258 band) and hybrid TE202 mode (for N260 band). The antenna is low profile with only 0.789 mm thickness including two dielectric layers and a bounding layer. The introduction of round and rectangle slots enhanced the frequency filterability. The operating frequency band is from 24.61 GHz to 27.74 GHz and 39.50 GHz to 42.15 GHz, almost covering 5G N258 (24.25-27.5 GHz) and N260 (37–40 GHz) mmWave bands with reflection coefficient less than -10 dB. The average gain in passband is 4.5 dBi and 1.6 dBi and the relative impedance bandwidth is 11.96% and 6.49%, respectively. The merits make the proposed dual frequency filtenna a good candidate for 5G mmWave applications.