NDLI: Compact planar active integrated inverted-F antenna with frequency reconfigurable capability

Content Provider	IET Digital Library
Author	Gundumalla, Ashok Agrawal, Sachin Parihar, Manoj Singh
Abstract	This study presents two compact high-efficiency active integrated antennas (AIAs) working at 2.15 GHz. Both AIAs are realised by integrating the planar inverted-F antenna (PIFA) at the back side of the class-E power amplifier. In the first design, the antenna input impedance is transformed into an optimum impedance of the power amplifier. It achieves the maximum power added efficiency (PAE) of 68.6% with a total dimension of 0.36λ 0 × 0.32λ 0 × 0.03λ 0 (λ 0 is calculated at 2.15 GHz). In the second design, the antenna directly connected to the drain terminal of the power amplifier and offers a maximum PAE of 74% with a compact size of 0.21λ 0 × 0.17λ 0 × 0.04λ 0, results in the size reduction of 59%. The novelty of the second design is it offers frequency reconfigurable nature by moving the shorting plate of PIFA without scaling the power amplifier and antenna, which can support Universal Mobile Telecommunications System (UMTS) (1920–2170 MHz), long term evolution (LTE)-40 (2300–2400), and Worldwide Interoperability for Microwave Access (WiMAX) (2500–2690 MHz) frequency bands. The measured results demonstrate that the proposed reconfigurable AIA yields the maximum PAE of 64% at both frequencies 2.3 and 2.6 GHz.
Starting Page	2012
Ending Page	2018
Page Count	7
ISSN	17518725
Volume Number	12
e-ISSN	17518733
Issue Number	Issue 13, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/12/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5236
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-07-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Antenna Amplifiers Antenna Input Impedance Class-E Power Amplifier Compact High-efficiency Active Integrated Antenna Compact Planar Active Integrated Inverted-F Antenna Drain Terminal Frequency 1920 MHz to 2170 MHz Frequency 2300 MHz to 2400 MHz Frequency 2500 MHz to 2690 MHz Frequency Reconfigurable Capability Frequency Reconfigurable Nature LTE-40 Frequency Band Maximum PAE Maximum Power Added Efficiency Microwave Circuit And Device Multifrequency Antenna PIFA Planar Inverted-F Antenna Reconfigurable AIA Shorting Plate Single Antenna UHF Antenna UHF Power Amplifiers UMTS Frequency Band WiMAX Frequency Band
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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