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Characteristics of aperture-coupled coplanar microstrip subarrays

Characteristics of aperture-coupled coplanar microstrip subarrays

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IEE Proceedings - Microwaves, Antennas and Propagation — Recommend this title to your library

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The characteristics of aperture-coupled microstrip antennas with parasitic elements are studied. Four configurations for increasing the bandwidth of aperture-coupled microstrip antennas are described. Additional patches are gap-coupled to the nonradiating edges of the rectangular fed patch. The spectral domain Green function approach and the reciprocity method are used for the analysis. The SWR bandwidth and the E- and H-plane beamwidths can be improved by changing the sizes and the locations of the parasitic patches. Low backlobe radiation can be achieved by locating a plane reflector slightly below the microstrip feedline. The bandwidth of the microstrip subarray can also be enhanced with the addition of the plane reflector. The theory is confirmed by experimental data.

References

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      • W. Chen , K.F. Lee , R.Q. Lee . Special-domain moment-method analysis of coplanarmicrostrip parasitic subarrays. Microw. Opt. Technol. Lett. , 157 - 163
    2. 2)
      • D.M. Pozar . Microstrip antenna aperture-coupled to a microstripline. Electron. Lett. , 49 - 50
    3. 3)
      • MacKinchan, J.C., Miller, P.A., Staker, M.R., Dahele, J.S.: `A wide bandwidthmicrostrip subarray for array antenna applications fed using aperture coupling', IEEE AP–S Int. Symp. Digest, 1989, p. 878–881.
    4. 4)
      • D.M. Pozar . A reciprocity method of analysis for printed slot and slot-coupled microstrip antennas. IEEE Trans. , 1439 - 1446
    5. 5)
      • T.M. Au , K.M. Luk . Effect of parasitic element on the characteristics of microstrip antenna. IEEE Trans. , 1247 - 1251
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