A Compact Printed Filtering Antenna Using a Ground-Intruded Coupled Line Resonator
| Autor: | Chao-Tang Chuang, Shyh-Jong Chung |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 59:3630-3637 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2011.2163777 |
| Popis: | A compact printed filtering antenna with high band-edge gain selectivity is presented. Occupying about the same substrate area as a conventional antenna, the proposed structure not only serves as a radiator but also a second-order bandpass filter, with one filter pole provided by a Γ-shaped antenna and the other by a newly proposed coupled line resonator. High band-edge selectivity is achieved due to two additional stop-band transmission zeros provided by the coupled line resonator. To minimize the required area and reduce the spurious radiation, a coupled line structure composed of a microstrip line and a coplanar waveguide by broadside coupling is adopted and intruded into the Γ-shaped antenna area. According to the filter specifications, a design procedure for the proposed filtering antenna is depicted in detail. One example at 2.45 GHz with a second-order Chebyshev bandpass filter of 0.1 dB equal-ripple response is tackled. As compared to the conventional Γ -shaped antenna, the proposed filtering antenna not only possesses a similar antenna gain but also provides better band-edge gain selectivity and flat passband gain response. The measured results, including the S-parameters, total radiated power, and antenna gains versus frequency, have good agreement with the designed ones. |
| Databáze: | OpenAIRE |
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