Proceedings ArticleDOI
The design of a 6-port active circulator
I.J. Bahl
- pp 1011-1014
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TLDR
In this paper, an approach for realizing circulators in the form of GaAs monolithic microwave integrated circuits (MMICs) without using any ferrite material and external magnets is presented.Abstract:
An approach is presented for realizing circulators in the form of GaAs monolithic microwave integrated circuits (MMICs) without using any ferrite material and external magnets. The configuration is known as an active circulator and is suitable for system applications where a fully integrable, lightweight, and small-size subsystem is required. The circuit is capable of providing 0 dB loss, and return loss and isolation of better than 16 dB and 23 dB, respectively, over an octave or higher bandwidth. >read more
Citations
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Journal ArticleDOI
Magnetless Nonreciprocal Metamaterial (MNM) Technology: Application to Microwave Components
TL;DR: In this article, the applicability of magnetless non-reciprocal metamaterial (MNM) technology to non-rewarding microwave components is investigated. And the authors present the first extensive investigation of the application of MNM technology to microwave components, including a microstrip-ring configuration, an isolator and a circulator.
Journal ArticleDOI
Field effect transistor circulators
TL;DR: In this article, field effect transistors are used to construct 2-, 3-, and 4-port passive non-reciprocal circulators for both narrowband and wideband applications.
Journal ArticleDOI
MMIC-Based Quadrature Hybrid Quasi-Circulators for Simultaneous Transmit and Receive
TL;DR: In this paper, a new type of monolithic microwave integrated circuit (MMIC)-based active quasi-circulator using phase cancellation and combination techniques for simultaneous transmit and receive (STAR) phasedarray applications is presented.
Journal ArticleDOI
Novel unilateral circuits for MMIC circulators
S. Hara,T. Tokumitsu,M. Aikawa +2 more
TL;DR: In this article, a circuit which is equivalent to a four-port circulator with one port terminated is proposed, called a quasi-circulator, which can replace a conventional circulator even though it is not a complete circulator.
Journal ArticleDOI
Microwave Nonreciprocity
TL;DR: A comprehensive review of past and present efforts in the field of microwave non-reciprocity with an emphasis on the most commonly used nonreciprocal devices, namely gyrators, isolators, and circulators, is provided in this article.
References
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Journal ArticleDOI
A Monolithic GaAs 1-13-GHz Traveling-Wave Amplifier
TL;DR: In this paper, a monolithic GaAs traveling-wave amplifier with 9dB gain and + 1-dB gain flatness in the 1-13 GHz frequency range is described, which is realized in monolithic form on a 0.1mm GaAs substrate with 50-Omega input and output lines.
Proceedings ArticleDOI
Phase Velocity Compensation in Parallel-Coupled Microstrip
TL;DR: In this paper, a cross between suspended-substrate stripline and microstrip can be used to manufacture quadrature couplers with improved, broadband directivity performance.
Patent
Microwave circulator comprising a plurality of directional couplers connected together by isolation amplifiers
TL;DR: In this paper, a gallium arsenide isolator has a common gate FET for amplifying a microwave signal and a common drain FET is used for isolating the common gate from signals travelling in a direction opposite to the microwave signal.