Reduced Size Planar Dual-Polarized Log-Periodic Antenna for Bidirectional High Power Transmit and Receive Applications

An improved method of more than halving the turn on frequency of a 4-arm log-periodic (LP) antenna for dual-circularly polarized (CP) bidirectional use is demonstrated. The ground plane currents of a slot-LP are manipulated by varying “ground plane” shape to form a ring-turnstile-slot LP aperture and thus extend the overall antenna bandwidth. The proposed concept is used to design and fabricate an antenna that is 2.3 times smaller than the conventional 4-arm LP and works from 500 MHz to 3 GHz. Microstrip impedance transformer/balun is used to feed the LP thus allowing for bidirectional use and much simpler beamforming network for dual-polarized operation. VSWR and far-field behavior of the antenna are characterized and its high-power thermal stability is demonstrated through a high-power test. The advantages over the previously designed ring-turnstile-LP configuration are highlighted and the design principles undertaken to make the antenna high-power capable are illustrated. The prototyped antenna is meant not only to illustrate the proposed concept but also as a viable high-power bidirectional antenna.

[1]  Zhijun Zhang,et al.  A Bidirectional High-Gain Cascaded Ring Antenna for Communication in Coal Mine , 2013, IEEE Antennas and Wireless Propagation Letters.

[2]  R. Duhamel,et al.  Broadband logarithmically periodic antenna structures , 1957 .

[3]  P. Richards,et al.  Planar channelized log-periodic antenna , 2005, 2005 IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications.

[4]  Dejan S. Filipovic,et al.  Frequency Independent Antennas , 2005 .

[5]  Hongyu Zhou,et al.  Dual-polarized K/Ka-band planar log-periodic antenna , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[6]  Keizo Cho,et al.  Bidirectional collinear antenna with arc parasitic plates , 1995, IEEE Antennas and Propagation Society International Symposium. 1995 Digest.

[7]  D. Filipović,et al.  Quasi Frequency-Independent Increased Bandwidth Planar Log-Periodic Antenna , 2014, IEEE Transactions on Antennas and Propagation.

[8]  Tobias J. Oechtering,et al.  Decode-and-forward strategies for bidirectional relaying , 2008, 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications.

[9]  G. Deschamps,et al.  Impedance properties of complementary multiterminal planar structures , 1959 .

[10]  Risto Valkonen,et al.  Impedance matching and tuning of non-resonant mobile terminal antennas , 2013 .

[11]  Jalil Rashed-Mohassel,et al.  Compact dual-polarisation planar log-periodic antennas with integrated feed circuit , 2005 .

[12]  O. Klemp,et al.  On the MIMO capacity of planar, log.-per. four-arm antennas , 2005, The European Conference on Wireless Technology, 2005..

[13]  Il-Min Kim,et al.  Relay Selection with ANC and TDBC Protocols in Bidirectional Relay Networks , 2010, IEEE Transactions on Communications.