Proceedings ArticleDOI
A self-mixing active antenna for communication and vehicle identification applications
C.M. Montiel,L. Fan,K. Chang +2 more
- Vol. 1, pp 333-336
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TLDR
In this paper, a cavity backed, Gunn diode driven, self-mixing active inverted stripline circular patch antenna has been developed for short communications links or as a microwave identification transceiver.Abstract:
A cavity backed, Gunn diode driven, self-mixing active inverted stripline circular patch antenna has been developed. The active antenna provides good radiation patterns with cross-polarization levels 18 dB below copolarization at boresight. The self-mixing performance shows that the circuit has a 2 dB conversion gain for IFs up to 450 MHz and a double sideband noise figure of 15 dB at 200 MHz. The antenna is suitable for use as a transceiver for short communications links or as a microwave identification transceiver.read more
Citations
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Journal ArticleDOI
Direct-signal modulation using a silicon microstrip patch antenna
Vincent Fusco,Qiang Chen +1 more
TL;DR: In this article, a microstrip patch antenna is fabricated directly onto a high-resistivity silicon substrate without an insulating barrier, thereby forming a distributed Schottky diode between the patch radiator metallization and ground plane.
Proceedings ArticleDOI
Direct antenna modulation - a promise for ultra-wideband (UWB) transmitting
Weijun Yao,Yuanxun Wang +1 more
TL;DR: In this paper, a novel antenna design concept is proposed based on antenna's nonlinear transient responses, where RF switches are integrated into a resonant antenna such as a patch antenna to turn off and turn on the antenna's radiation slots directly.
Journal ArticleDOI
Fundamental Limits, Bandwidth, and Information Rate of Electrically Small Antennas: Increasing the Throughput of an Antenna Without Violating the Thermodynamic Q-Factor
TL;DR: In this article, different techniques for transmitting a high-information-rate signal using a narrow-band (high-Q-factor) antenna are presented from an energy balance and thermodynamic point of view.
Patent
Microwave/millimeter wave sensor apparatus
Hitoshi Utagawa,Toshiaki Matsui +1 more
TL;DR: In this article, a microwave/millimeter wave sensor apparatus including a planar radiation type oscillator substrate having an inner-layer GND interposed between a front surface side dielectric substrate and a rear surface side DSS substrate is presented, and a pair of conductor patches in an axis-symmetric manner on the side of the front surface layer.
Patent
Wireless communication network system
Hitoshi Utagawa,Toshiaki Matsui +1 more
TL;DR: In this paper, a wireless communication system consisting of a plurality of wireless communication devices including a radiating oscillator (1), a baseband signal generating unit (4), and a reception signal detecting unit (7) was proposed.
References
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Journal ArticleDOI
Experiments on injection locking of active antenna elements for active phased arrays and spatial power combiners
Kai Chang,K.A. Hummer,J.L. Klein +2 more
TL;DR: In this article, two types of active antenna elements have been studied experimentally, one using a microstrip antenna with an active device mounted directly on the antenna and the other using an active devices coupled to the microstrip patch antenna through an aperture.
Journal ArticleDOI
Quasi-optical HEMT and MESFET self-oscillating mixers
V.D. Hwang,Tatsuo Itoh +1 more
TL;DR: In this article, a planar quasi-optical receiver that compactly integrates a coupled slot antenna and a HEMT or MESFET balanced self-oscillating mixer and on the same substrate for applications in microwave and millimeter-wave receiver arrays is discussed.
Journal ArticleDOI
Active inverted stripline circular patch antennas for spatial power combining
J.A. Navarro,Lu Fan,Kai Chang +2 more
TL;DR: In this paper, an active patch antenna is proposed for spatial power-combining applications, which uses an inverted stripline topology to take advantage of several features such as avoiding drilling through the circuit substrate to insert the diode and the use of air within the resonant cavity to reduce loss.
Journal ArticleDOI
A resonant tunnelling diode self-oscillating mixer with conversion gain
TL;DR: In this paper, an 11 GHz self-oscillating microwave mixer using a resonant tunneling diode is described, achieving a maximum conversion gain of 10 dB with an associated noise figure of 11.5 dB.
Proceedings ArticleDOI
A low cost DBS low noise block downconverter with a DR stabilized MESFET self-oscillating mixer
TL;DR: In this article, a low-noise block downconverter with a DR stabilized MESFET self-oscillating mixer (SOM) for DBS application is presented.