NDLI: Compact and Tunable Slot-Loop Antenna

Content Provider	IEEE Xplore Digital Library
Author	Pei-Ling Chi Waterhouse, R. Itoh, T.
Copyright Year	1963
Abstract	A compact and tunable slot-loop antenna is studied in this communication. By periodically loading the slot line with varactor diodes, the slow-wave loop is capable of operating at frequencies from 2.34 GHz to 4 GHz with the measured input reflection coefficient better than -7.5 dB while occupying a small footprint of 0.072 λ_g × 0.072 λ_g (8.1 mm × 8.1 mm), where λ_g is the guided wavelength of a slot line at 2.34 GHz. The slot-loop in the ground plane is excited by a simple microstrip line, which enables the impedance matching from 3.2 GHz to 4 GHz for VSWR ≤ 2. A LC low-pass circuit is configured into the bias network to isolate the RF signal from the DC power path and consistent radiation patterns are experimentally obtained across the entire tunable frequencies of interest. The slot loop combined with the feed line and the bias circuitry is only 40 mm × 38.97 mm. Experimental results validate the feasibility of the presented antenna and agree well with simulation data.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1394
Ending Page	1397
Page Count	4
File Size	569127
File Format	PDF
ISSN	0018926X
Volume Number	59
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Varactors Slot antennas Antenna measurements Resonant frequency Antenna radiation patterns Bandwidth tunable antenna Compact antenna slot-loop
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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