Multi-Port Patch Antennas for Flexible Power Combining and Feeding Choice

Patch antennas with multiple feeds are proposed in this paper. The antennas consist of a traditional square patch and feeding probes that are set in a line orthogonal to the polarization direction. In addition to radiating EM energy just like the conventional antennas, the proposed multi-port antennas can also realize on-antenna power combining without power combiner. Thanks to this, high-line losses and large system size caused by extra power combiner can be avoided. Moreover, since the location and the number of ports have a limited effect on the antenna performances, flexible feeding strategies can be chosen in different applications. For demonstration, four patch antennas with a different number of ports (one port, two ports, three ports, and four ports) are designed at the center frequency of 1.5 GHz. Compared with the traditional one-port patch antenna, the proposed three multi-port patch antennas can achieve nearly the same antenna performance, including bandwidth, polarization, efficiency, and radiation pattern. Besides, one-port antenna and two-port antenna integrated with a two-way power amplifier are designed and measured, respectively. Then, they are compared to further prove the proposed power combining method in multi-port antennas.

[1]  Tharek Abd Rahman,et al.  A PLANAR ANTENNA ARRAY WITH SEPARATED FEED LINE FOR HIGHER GAIN AND SIDELOBE REDUCTION , 2009 .

[2]  J. A. Navarro,et al.  Active inverted stripline circular patch antennas for spatial power combining , 1993 .

[3]  Marek E. Bialkowski,et al.  Investigations into power-combining efficiency of microstrip patch transmit arrays , 1999 .

[4]  Quan Xue,et al.  A Differentially-Driven Dual-Polarized Magneto-Electric Dipole Antenna , 2013, IEEE Transactions on Antennas and Propagation.

[5]  A. Kishk,et al.  Analysis of Wideband Dielectric Resonator Antenna Arrays for Waveguide-Based Spatial Power Combining , 2007, IEEE Transactions on Microwave Theory and Techniques.

[6]  Peter Gardner,et al.  Compact power combining patch antenna , 2002 .

[7]  Cheng Sun,et al.  Millimeter-Wave Power-Combining Techniques , 1983 .

[8]  Wei Hong,et al.  Integrated sub-harmonically pumped up-converter antenna for spatial power combining , 2009 .

[9]  Kai Chang,et al.  Novel active FET circular patch antenna arrays for quasi-optical power combining , 1994 .

[10]  Hua Wang,et al.  A multi-feed antenna for antenna-level power combining , 2016, 2016 IEEE International Symposium on Antennas and Propagation (APSURSI).

[11]  Edward J. Wollack,et al.  Millimeter-wave antireflection coating for cryogenic silicon lenses. , 2006, Applied optics.

[12]  Sravan Kumar Sagi,et al.  High power and low cross-polarization microstrip patch array antenna at S-band , 2012 .

[13]  Ali Hajimiri,et al.  Multi-Port Driven Radiators , 2013, IEEE Transactions on Microwave Theory and Techniques.

[14]  Derek A. McNamara,et al.  Improved dual-feed single-beam powercombining reflectarray antenna , 2013 .

[15]  Thomas Zwick,et al.  Active Multiple Feed On-Chip Antennas With Efficient In-Antenna Power Combining Operating at 200–320 GHz , 2017, IEEE Transactions on Antennas and Propagation.

[16]  Quan Xue,et al.  Compact UHF Three-Element Sequential Rotation Array Antenna for Satcom Applications , 2017, IEEE Transactions on Antennas and Propagation.

[17]  Marek E. Bialkowski,et al.  Investigations into a power-combining structure using a reflectarray of dual-feed aperture-coupled microstrip patch antennas , 2002 .