Dual-Band Filtering Antenna With Novel Transmission Zero Characteristics

A single-layer two-pole dual-band filtering antenna (DBFA) with orthogonal polarizations in the two bands is presented in this letter. The DBFA is based on a common dual-mode T-shaped resonator (TR). The two modes of the common resonator each couple to one of the two orthogonally placed patches, resulting in required radiation. The TR is responsible for generation of three transmission zeroes (TZs) in frequency response corresponding to each polarization at the broadside: two of them being intrinsic TZs due to the TR and the third caused by far field interference of TR's radiation with that of the patch.The low profile microwave design has its two passbands operating at 4.13 and 4.7 GHz (resulting in a frequency ratio of 1.14) with 10 dB return loss bandwidths of 1.2% and 2.9%, respectively.

[1]  Tatsuo Itoh,et al.  Low-Profile Diplexing Filter/Antenna Based on Common Radiating Cavity With Quasi-Elliptic Response , 2018, IEEE Antennas and Wireless Propagation Letters.

[2]  Tatsuo Itoh,et al.  Low-Profile Dual-Band Filtering Antenna Using Common Planar Cavity , 2018, IEEE Antennas and Wireless Propagation Letters.

[3]  L. J. Jiang,et al.  Beam Scanning Realized by Coupled Modes in a Single-Patch Antenna , 2018, IEEE Antennas and Wireless Propagation Letters.

[4]  Tatsuo Itoh,et al.  Half-Mode Cavity-Based Planar Filtering Antenna With Controllable Transmission Zeroes , 2018, IEEE Antennas and Wireless Propagation Letters.

[5]  Kwok Wa Leung,et al.  Wide-/Dual-Band Omnidirectional Filtering Dielectric Resonator Antennas , 2018, IEEE Transactions on Antennas and Propagation.

[6]  T. Itoh,et al.  Compact dual-band filtering antenna based on capacitor loaded patch radiator , 2017, 2017 IEEE Asia Pacific Microwave Conference (APMC).

[7]  Kwai-Man Luk,et al.  Microstrip Patch Antennas , 2017 .

[8]  F. Bilotti,et al.  Design and experimental validation of dual-band circularly polarised horn filtenna , 2017 .

[9]  Yi Wang,et al.  Dual-Band Patch Antenna With Filtering Performance and Harmonic Suppression , 2016, IEEE Transactions on Antennas and Propagation.

[10]  Tzyh-Ghuang Ma,et al.  A Compact Dual-Band Filtering Patch Antenna Using Step Impedance Resonators , 2015, IEEE Antennas and Wireless Propagation Letters.

[11]  Shyh-Jong Chung,et al.  A Compact Filtering Microstrip Antenna With Quasi-Elliptic Broadside Antenna Gain Response , 2011, IEEE Antennas and Wireless Propagation Letters.

[12]  Wen Duan,et al.  Low-Profile Dual-Band Filtering Patch Antenna and Its Application to LTE MIMO System , 2017, IEEE Transactions on Antennas and Propagation.

[13]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .