1993 documents found.

MRF volume 13 issue 1 Cover and Back matter
Published online : 01-02-2021
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MRF volume 13 issue 1 Cover and Front matter
Published online : 01-02-2021
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A 31 GHz body-biased configurable power amplifier in 28 nm FD-SOI CMOS for 5 G applications
Florent Torres, Eric Kerhervé, Andreia Cathelin, Magali De Matos
Published online : 01-02-2021
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This paper presents a 31 GHz integrated power amplifier (PA) in 28 nm Fully Depleted Silicon-On-Insulator Complementary Metal Oxide Semiconductor (FD-SOI CMOS) technology and targeting SoC implementation for 5 G applications. Fine-grain wide range power control with more than 10 dB tuning range is enabled by body biasing feature while the design improves voltage standing wave ratio (VSWR) robustne
Miniature drone antenna design for the detection of airliners
Alassane Sidibe, Gaël Loubet, Alexandru Takacs, Guillaume Ferré, Anthony Ghiotto
Published online : 01-02-2021
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In this paper, the design of a miniature antenna dedicated to the detection of airliners through the demodulation of Automatic Dependence Surveillance-Broadcast system (ADS-B) signals is presented. This antenna is designed for being embedded on the top of a drone in order to detect and avoid collisions with airliners. This antenna consists of an array of Planar Inverted-F Antennas, a quadrature fe
A compact dual band-notched SWB antenna with high bandwidth dimension ratio
Aliakbar Dastranj, Ghazaleh Lari, Mosayeb Bornapour
Published online : 01-02-2021
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In this research, a compact dual band-notched (DBN) super-wideband (SWB) coplanar waveguide-fed antenna with high bandwidth (BW) dimension ratio of 7427.4 has been presented. The proposed antenna covers a very wide frequency range from 2.8 to 40 GHz (BW ratio of 14.28:1) with ||
Further realization of a flexible metamaterial-based antenna on indium nickel oxide polymerized palm fiber substrates for RF energy harvesting
Taha A. Elwi, Ali M. Al-Saegh
Published online : 01-02-2021
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This paper discusses the design and fabrication of a low-profile Hilbert-shaped metamaterial (MTM) array-based antenna, forming a rectangular patch with partial ground plane backing; the rest is slotted with traces for RF energy harvesting. The antenna is mounted on a 28 mm × 32 mm indium nickel oxide polymerized palm fiber (INP) substrate and compared to the identical one based on FR4 substrate.
A 3-bit load-pulling digital power amplifier
Gavin T. Watkins
Published online : 01-02-2021
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A radio frequency (RF) 3-bit digital power amplifier (DPA) is described in this paper. It consists of three RF amplifiers connected at their outputs with a transmission line (TL) network. The three amplifiers are designed for different output powers (). The TL network allows them to load-pull one other to achieve eight different amplitude states by alternatively enabling and disabling the amplifie
Feather-shaped super wideband MIMO antenna
Sarthak Singhal
Published online : 01-02-2021
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Two configurations of a modified feather-shaped antenna element are proposed for super wideband (SWB) multiple-input multiple-output (MIMO) applications. The antenna element geometry comprises of a circular slot-loaded feather-shaped radiator and rectangular notch-loaded quarter elliptical coplanar waveguide ground plane. An operating bandwidth of 4.4?51.5 GHz with inter-port isolation, ? 15 dB f
An ultra-wideband, polarization insensitive metamaterial absorber based on multiple resistive film layers with wide-incident-angle stability
Guangsheng Deng, Kun Lv, Hanxiao Sun, Yuan Hong, Xiaoying Zhang, Zhiping Yin, Ying Li, Jun Yang
Published online : 01-02-2021
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In this work, we propose a broadband, polarization-insensitive and wide incident angle stable metamaterial absorber (MA) based on the resistive film. The absorber consists of a three-layer structure with each layer of dielectric substrate printed with different shapes of resistive film. The multilayer structure not only extends the absorption bandwidth but also maintains high absorption under larg
Separately-designable diplexer with multiple transmission zeroes using common stub-loaded SIR
Yu-Jing Zhang, Jing Cai, Jian-Xin Chen
Published online : 01-02-2021
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A separately-designable diplexer with multiple transmission zeroes (TZs) using common stub-loaded stepped impedance resonator (SIR) is proposed. The common stub-loaded SIR operating in third harmonic () and fifth harmonic () is used for designing the two diplexer channels. The stub is loaded at the voltage-null point of of the SIR. It can separately control but has no effect on so that the two