A low-profile wideband planar antenna
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal
Related Research Unit(s)
|Journal / Publication||IEEE Transactions on Antennas and Propagation|
|Publication status||Published - 2013|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-84883698998&origin=recordpage|
A wideband planar antenna with a low profile of 0.095λ0, where λ0 is the wavelength referring to the center frequency of the operating band, is proposed. Using the concept of complementary antenna, two shorted quarter-wave microstrip patch antennas, operating as magnetic dipoles, and two planar electric dipoles are connected together and excited simultaneously by a coaxial-to-microstrip impedance transformer. For further size reduction and back radiation suppression, a U-shaped reflector is employed. Experimentally, the proposed antenna exhibited an impedance bandwidth of 51.5% with SWR ≤ 1.5 from 1.96 to 3.32 GHz, a boresight gain of 6.9 ± 1.1 dBi and a unidirectional radiation pattern with low cross-polarization and back radiation levels. Moreover, the dc grounded structure fulfills the requirement for lightning protection in outdoor applications. © 1963-2012 IEEE.
- Low-profile antenna, Unidirectional patterns, Wideband antenna