A 3-D Millimeter-Wave Filtering Antenna With High Selectivity and Low Cross-Polarization

A three-dimensional (3-D) filtering antenna with features of high selectivity and low cross-polarization is proposed and experimentally verified in this communication. Thanks to the vertically 3-D integration, the high selectivity at either frequency sides of the filtering antenna is achieved by a novel cross-coupling scheme between in-band and out-of-band modes in a single cavity located in the lower substrate, while the low cross-polarization in the far-held is realized due to the symmetric feed and radiators on a cavity-backed dual-slot antenna at the upper substrate. In our design, the cavity-backed dual-slot antenna performs not only a radiator but also the last resonator of the bandpass filter (BPF). A prototype is demonstrated at Ka-band with a center frequency of 31.495 GHz and fractional bandwidth of 1.56%. Two radiation nulls [transmission zeros (TZs)] at either frequency band edges can be observed and a cross-polarization level lower than -30 dB is obtained.

[1]  Guo Qing Luo,et al.  Cavity backed dual slot antenna for gain improvement , 2010 .

[2]  W. Yin,et al.  An Extended Doublet Substrate Integrated Waveguide (SIW) Bandpass Filter With a Complementary Split Ring Resonator (CSRR) , 2009, IEEE Microwave and Wireless Components Letters.

[3]  Jiao-Jiao Xie,et al.  A New Compact Filter-Antenna for Modern Wireless Communication Systems , 2011, IEEE Antennas and Wireless Propagation Letters.

[4]  Ke Wu,et al.  Filtenna Consisting of Horn Antenna and Substrate Integrated Waveguide Cavity FSS , 2007, IEEE Transactions on Antennas and Propagation.

[5]  Xun Gong,et al.  A Seamless Integration of 3-D Vertical Filters With Highly Efficient Slot Antennas , 2011, IEEE Transactions on Antennas and Propagation.

[6]  M.M. Tentzeris,et al.  Design and Development of Advanced Cavity-Based Dual-Mode Filters Using Low-Temperature Co-Fired Ceramic Technology for $V$-Band Gigabit Wireless Systems , 2007, IEEE Transactions on Microwave Theory and Techniques.

[7]  Fei Xiao,et al.  Substrate integrated waveguide dual-mode filter using slot lines perturbation , 2010 .

[8]  Tao Yang,et al.  Very Compact and Low-Profile LTCC Unbalanced-to-Balanced Filters With Hybrid Resonators , 2011, IEEE Transactions on Microwave Theory and Techniques.

[9]  Y Yusuf,et al.  Vertically Integrated Three-Pole Filter/Antennas for Array Applications , 2011, IEEE Antennas and Wireless Propagation Letters.

[10]  Wei-Chen Hsu,et al.  Novel planar, square-shaped, dielectric-waveguide, single-, and dual-mode filters , 2002 .

[11]  C. Person,et al.  Integration of an Antenna/Filter Device, using a Multi-Layer, Multi-Technology Process , 1998, 1998 28th European Microwave Conference.

[12]  Wei Hong,et al.  Ku-Band Linearly Polarized Omnidirectional Planar Filtenna , 2012, IEEE Antennas and Wireless Propagation Letters.

[13]  Y Yusuf,et al.  Compact Low-Loss Integration of High- $Q$ 3-D Filters With Highly Efficient Antennas , 2011, IEEE Transactions on Microwave Theory and Techniques.

[14]  Gabriel M. Rebeiz,et al.  Integration of filters and microstrip antennas , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).

[15]  Cyrus Shafai,et al.  Filter-Antenna Module Using Substrate Integrated Waveguide Cavities , 2011, IEEE Antennas and Wireless Propagation Letters.

[16]  U. Rosenberg,et al.  Characteristics of cross (bypass) coupling through higher/lower order modes and their applications in elliptic filter design , 2005, IEEE Transactions on Microwave Theory and Techniques.

[17]  W. Yin,et al.  A Novel Single-Cavity Dual Mode Substrate Integrated Waveguide Filter With Non-Resonating Node , 2009, IEEE Microwave and Wireless Components Letters.

[18]  Xi-Lang Zhou,et al.  A Substrate-Integrated Evanescent-Mode Waveguide Filter With Nonresonating Node in Low-Temperature Co-Fired Ceramic , 2010, IEEE Transactions on Microwave Theory and Techniques.

[19]  U. Rosenberg,et al.  Novel design possibilities for dual-mode filters without intracavity couplings , 2002, IEEE Microwave and Wireless Components Letters.

[20]  S. Amari,et al.  Adaptive synthesis and design of resonator filters with source/load-multiresonator coupling , 2002 .

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

[22]  G. Luo,et al.  Directivity‐enhanced planar slot antenna backed by substrate integrated waveguide cavity , 2023, Microwave and Optical Technology Letters.

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

[24]  Jun-Fa Mao,et al.  Balanced-to-Balanced Gysel Power Divider With Bandpass Filtering Response , 2013, IEEE Transactions on Microwave Theory and Techniques.