NDLI: Method of Isolating and Tuning the Two Dominant Modes of a Printed Inverted-F Antenna

Content Provider	IEEE Xplore Digital Library
Author	Boldaji, A. Antoniades, M.A.
Copyright Year	1963
Abstract	A systematic method for decoupling and increasing the tunability of the first and third-order resonant modes of a compact, printed inverted-F antenna is presented. By identifying and utilizing surface-current symmetry in the third mode of a single-meander structure, a branch substitution is performed to support a new resonant boundary condition and allow independent tuning of the third mode. This allows a third-to-first-order harmonic frequency ratio of less than 3:1 to be achieved, with simple design equations presented to provide the antenna designer with flexibility for targeting certain bands. The methodology is further validated by incorporating two such branches and a ground slot to demonstrate a multiband inverted-F antenna targeting typical cellular and wireless bands (GSM-900, UMTS-2100 and WLAN-2.4 GHz). The 65×110 mm manufactured antenna exhibits better than -6 dB [S₁₁] from 880-1000 MHz, 1920-1980 MHz, and 2060-2640 MHz, with measured radiation efficiencies in the range of 72 to 93%. The close agreement between simulation and measurement demonstrates the suitability of the design methodology for use in compact, multiband antenna designs for personal communication devices.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3420
Ending Page	3426
Page Count	7
File Size	2593254
File Format	PDF
ISSN	0018926X
Volume Number	61
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	multi-band antennas Microstrip antennas mobile antennas
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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