A Planar Vertically-Integrated Tunable Filter/Antenna With Constant Absolute Bandwidth

Keywords

Bandpass filter; Patch antenna; Tunable filter; Varactor

Abstract

This paper presents a vertically-integrated second-order tunable planar filter/antenna that expands upon previous work with tunable filter/antennas. This work demonstrates the use of a radiating element as a resonator in the filter and uses mixed electric and magnetic coupling to achieve a constant absolute bandwidth over the filter tuning range without the need of additional tuning elements on the coupling structures. The device is tunable from 1.65 to 1.95 GHz with an absolute bandwidth of 52.03 ± 2.76 MHz and return loss above 15 dB over the tuning range. The measured gain is -0.52-5.72 dBi with cross-polarization level better than 15 dB.

Publication Date

10-4-2017

Publication Title

IEEE MTT-S International Microwave Symposium Digest

Number of Pages

2011-2014

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/MWSYM.2017.8059063

Socpus ID

85032490827 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85032490827

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