A Filtering Patch Antenna With Reconfigurable Frequency and Bandwidth Using F-Shaped Probe

A Filtering Patch Antenna With Reconfigurable Frequency and Bandwidth Using F-Shaped Probe

A wideband filtering patch antenna is investigated in this paper. The patch antenna is fed by an F-shaped probe, which consists of one upper and two lower horizontal arms, as well as a vertical arm that connects them. Owing to the novel excitation scheme, two probe modes along with a patch mode are...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2019-01, Vol.67 (1), p.121-130
Main Authors: Hu, Peng Fei, Pan, Yong Mei, Zhang, Xiu Yin, Hu, Bin-Jie
Format: Article
Language:eng
Subjects:
Antenna radiation patterns
Antennas
Bandpass filters
Bandwidths
Broadband
Broadband antennas
Circuit design
Couplings
Cross coupling
Diodes
Filtering
Filtering antenna
patch antenna
Patch antennas
Probes
reconfigurable antenna
Reconfiguration
Selectivity
Varactor diodes
Wideband
wideband antenna
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Summary:A wideband filtering patch antenna is investigated in this paper. The patch antenna is fed by an F-shaped probe, which consists of one upper and two lower horizontal arms, as well as a vertical arm that connects them. Owing to the novel excitation scheme, two probe modes along with a patch mode are simultaneously excited within the passband, producing a wide bandwidth of 21.3% with stable antenna gains and radiation patterns. Meanwhile, cross-coupling is constructed in the antenna, generating two symmetrical radiation nulls right at the two sides of the passband. Consequently, a compact filtering antenna with bandpass response and high selectivity is obtained, without utilizing any extra filtering circuit. This design is also extended to realize a reconfigurable filtering antenna. Two varactor diodes are embedded in the F-shaped probe to continuously tune the frequency of the operating band from 2.05 to 2.52 GHz. The antenna bandwidth can be flexibly tuned from 2.2% to 21.3%, and simultaneously good filtering performance is kept during the tuning of different states.
ISSN:0018-926X
1558-2221