Active planar inverted-F antennas for wireless applications

Ellis, Grant A.; Liw, S.

doi:10.1109/tap.2003.818007

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…For mm, the resulting input impedance at becomes . The PIFA using two shorting pins can be tuned for high efficiency operation as follows; the top plate position is varied so that the feed pin is located somewhere near the center to provide a nearly class-F termination at some frequency [7]. A nearly inverse class-F impedance results by placing the feed pin closer to the corner of the top-plate.…”

Section: A Pifa Performance Versus Orientation Of Top-plate Relativementioning

confidence: 99%

Planar inverted-F antennas as an inverse class-F termination for wireless applications

Liw

Ellis

2003

Antennas Wirel. Propag. Lett.

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We present an electrically small antenna for use with high-efficiency power amplifiers for wireless applications. A planar inverted-F antenna (PIFA) design is shown that is optimized to provide an inverse class-F load termination for use at the output of a field effect transistor (FET) for optimum output power and efficiency. A power-added efficiency in excess of 60% was also measured for an active PIFA.

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Section: A Pifa Performance Versus Orientation Of Top-plate Relativementioning

confidence: 99%

Planar inverted-F antennas as an inverse class-F termination for wireless applications

Liw

Ellis

2003

Antennas Wirel. Propag. Lett.

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“…Provided an antenna provides both class-F load and DC-block functions, the active antenna can be miniaturized significantly. Several antenna designs have been proposed to provide class-F load functionality, for instance, a planar inverted-F antenna (PIFA) [33,34], folded-dipole antenna (FDA) [35], and slot antenna [36]. As MPT requires high directivity, patch antennas are more suitable than either PIFAs or FDAs.…”

Section: Introductionmentioning

confidence: 99%

Microstrip patch antenna with class-F load and DC block function for microwave power transfer

Oshima

Ban

Hirayama

2021

IEICE Electron. Express

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This study proposes a novel microstrip patch antenna for microwave power transfer that functions as a class-F load and DC block. These functions enable a direct connection between an antenna and a power device (field-effect transistor) without using a class-F load circuit and capacitor for a DC block. In numerical simulations of a 2.45-GHz antenna, a reflection coefficient is -21.27 dB at the fundamental frequency, and a reflection coefficient and phase at the 3rd harmonic frequency are -0.99 dB and -1.4º, respectively. The simulated gain is 5.59 dBi at 2.45 GHz.

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“…Therefore, it is useful to integrate class-F function into an antenna. Liw et al proposed novel inverted-F antenna with inverse class-F load function [6]. This antenna consists of a threelayered structure: feeding layer, ground layer and antenna layer.…”

Section: Introductionmentioning

confidence: 99%

Folded dipole antenna with class-F load function for rectenna of microwave power transfer

Oshima

Hirayama

2020

IEICE ComEX

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A folded dipole antenna with a class-F load, acting as a receiving antenna for microwave wireless power transfer, is proposed. Conventionally, a class-F load circuit and matching circuit are connected to a rectifier circuit. A capacitor is used to adjust the impedance for harmonic waves. The proposed antenna involves both the class-F load and matching circuit functions to decrease loss in the circuit and reduce space usage. The antenna design was optimized and demonstrated to verify the class-F function.

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Active planar inverted-F antennas for wireless applications

Cited by 10 publications

References 5 publications

Planar inverted-F antennas as an inverse class-F termination for wireless applications

Planar inverted-F antennas as an inverse class-F termination for wireless applications

Microstrip patch antenna with class-F load and DC block function for microwave power transfer

Folded dipole antenna with class-F load function for rectenna of microwave power transfer

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