Journal ArticleDOI
Spatial power combining using active microstrip patch antennas
Kenneth A. Hummer,Kai Chang +1 more
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TLDR
In this paper, active antenna elements have been fabricated using Gunn diodes and microstrip patch antennas, and the power outputs from two of these elements were successfully combined in space.Abstract:
Active antenna elements have been fabricated using Gunn diodes and microstrip patch antennas. The power outputs from two of these elements have been successfully combined in space. Frequency coherency was achieved by injection locking using either the spatial locking technique or the mutual coupling locking technique.read more
Citations
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Journal ArticleDOI
Active integrated antennas
TL;DR: Active integrated antenna (AIA) technologies have been extensively studied in the past decade or so as discussed by the authors, with a brief introduction on the definition and some historical remarks on the research effort on the past decades or so.
Journal ArticleDOI
Active radiating element using FET source integrated with microstrip patch antenna
TL;DR: In this article, an FET source was integrated with a microstrip patch antenna to form an active radiating module, which served both as a radiating element and a resonator in the feedback loop for the FET oscillator.
Dissertation
Novel Tuned Rectangular Patch Antenna as a Load for Phase Power Combining
TL;DR: In this paper, the main approaches to reducing system and operating costs is the conservation of system power resources and minimization of power wasted as heat, which is the main way to reduce system power consumption.
Journal ArticleDOI
Modified rectangular patches for self-oscillating active-antenna applications
TL;DR: In this article, two modifications to a rectangular-patch antenna, suitable for the integration of active devices, are presented, which allow optimal matching of the active device by changing the position, width, and length of the impedance-line transformer.
Journal ArticleDOI
Frequency agile microstrip antenna symmetrically loaded with tunnel diodes
TL;DR: In this paper, a new technique for designing the frequency agile microstrip antenna is presented, where the frequency agility is achieved by symmetrical loading of two identical tunnel diodes in which the operating frequency is electronically controlled by the bias voltage of tunnel Diodes.
References
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Journal ArticleDOI
A Study of Locking Phenomena in Oscillators
TL;DR: In this paper, a differential equation is derived which gives the oscillator phase as a function of time, and with the aid of this equation, the transient process of "pull-in" as well as the production of distorted beat note are described in detail.
Journal ArticleDOI
V-band Low-noise Integrated Circuit Receiver
TL;DR: In this article, a low-noise V-band integrated circuit receiver was developed for space communication systems, the receiver accepts an RF input of 60-63 GHz and generates an IF output of 3-6 GHz.
Proceedings ArticleDOI
W-Band (75-110 GHz) Microstrip Components
Kai Chang,D. English,R.S. Tahim,A. Grote,Thang Pham,Cheng Sun,G.M. Hayashibara,P.C.H. Yen,W.S. Piotrowski +8 more
TL;DR: In this paper, various microstrip components, including mixers, IMPATT oscillators, Gunn oscillator, doublers, circulators, and IMPATT amplifiers, have been developed at W-band with state-of-the-art performance.
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