A Conformal Ultrawideband Antenna With Monopole-Like Radiation Patterns

A simple conformal ultrawideband (UWB) antenna with monopole-like radiation patterns is proposed in this communication. To achieve the wide bandwidth, two rings are arranged concentrically around the main annular-ring circular patch antenna, in which two rectangular slots are added. The antenna has...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2020-08, Vol.68 (8), p.6383-6388
Main Authors: Mohamadzade, Bahare, Simorangkir, Roy B. V. B., Hashmi, Raheel M., Lalbakhsh, Ali
Format: Article
Language:English
Subjects:
Antenna measurements
Antenna radiation patterns
Antennas
Bandwidth
Bandwidths
Circular patch
Communications systems
conformal antenna
Electronics
Engineering Sciences
flexible antenna
Frequencies
monopole-like radiation pattern
Monopoles
Patch antennas
Polydimethylsiloxane
Propagation modes
ring patch
Structural rings
Ultra wideband antennas
Ultrawideband
ultrawideband (UWB)
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Summary:A simple conformal ultrawideband (UWB) antenna with monopole-like radiation patterns is proposed in this communication. To achieve the wide bandwidth, two rings are arranged concentrically around the main annular-ring circular patch antenna, in which two rectangular slots are added. The antenna has monopole-like radiation patterns generated by combining four propagation modes of TM 01 , TM 02 , TM 03 , and TM 04 throughout the operating bands. To enhance the flexibility and robustness, the proposed antenna is fabricated using conductive fabric embedded into polydimethylsiloxane (PDMS) polymer. To our knowledge, this is the first flexible UWB antenna with monopole-like radiation patterns reported in the open literature. The measured results show that the antenna achieves a 10 dB return loss bandwidth from 2.85 to 8.6 GHz. Monopole-like radiation patterns are maintained throughout the frequency band, agreeing well with simulated results. This has been validated through the measured mean realized gain (MRG) pattern from 2.85 to 8.6 GHz. The fabricated antenna was bent and tested at various curvatures to verify its conformability. To evaluate suitability for UWB communications, the system-fidelity factors of the antenna are investigated using full-wave analysis in CST Microwave Studio, in both flat and bent conditions, validating its potential for UWB pulse transmission.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2020.2969744