Journal ArticleDOI
Frequency offset retrodirective antenna array
S.L. Karode,Vincent Fusco +1 more
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TLDR
In this paper, a Van Atta self-steering array with enhanced retro-directive properties is presented, and the experimental performance of the array is demonstrated and a technique is described which compensates for the beam pointing error induced by antenna array element directivity.Abstract:
A new architecture for the Van Atta self-steering array is presented. Active antenna techniques are used to realise a compact self-steering array with enhanced retrodirective properties. The experimental performance of the array is demonstrated and a technique is described which compensates for the beam pointing error induced by antenna array element directivity.read more
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Journal ArticleDOI
Developments in retrodirective array technology
Vincent Fusco,Neil Buchanan +1 more
TL;DR: The authors give a brief historical review of basic retrodirective technology and elaborate on some recent developments at Queens University of Belfast associated with retrodirectives antenna technology in relation to, two-way communications, ultrafast RADAR, microwave imaging, spatial power transmission, mitigation of multipath effects and spatial encryption.
Journal ArticleDOI
Balanced subharmonic mixers for retrodirective-array applications
TL;DR: In this article, a new phase conjugate mixer topology is proposed, whereby the use of a harmonic mixer instead of the conventional fundamental type effectively halves the LO frequency requirement.
Journal ArticleDOI
Overview on the Phase Conjugation Techniques of the Retrodirective Array
TL;DR: The concepts, advantages, and disadvantages of phase conjugation techniques are introduced, and the self-phasing characteristic and technical difficulties of the array are presented.
Journal ArticleDOI
Analysis and characterization of PLL-based retrodirective array
TL;DR: The PLL approach introduced in this paper offers considerable practical advantage when used within retrodirective antenna arrays, as compared to the classical mixer-based approach where mixer losses and RF-to-IF frequency isolation are major issues.
Journal ArticleDOI
A retrodirective transponder with polarization duplexing for dedicated short-range communications
Cyril Luxey,Jean-Marc Laheurte +1 more
TL;DR: In this paper, a microwave active transponder using a two-port cross-shaped microstrip antenna is presented, where the linearly polarized field coming from an interrogating signal is received by the first port, amplified and used as the locking signal of a local oscillator.
References
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Journal ArticleDOI
Van Atta reflector array
TL;DR: The Van Atta reflector array as mentioned in this paper is an array in which the elements are interconnected to reradiate received energy back in the direction of arrival, and it is sensitive only to incident waves in the frequency band of and having the polarization of the dipoles.
Journal ArticleDOI
An active retrodirective array for satellite communications
S. Andre,D. Leonard +1 more
TL;DR: In this paper, the concept and design of an active retrodirective array, resulting from the specialized requirements and constraints of space/earth communications, is presented. And the advantages of employing active microwave gain are discussed.
THE EVOLUTION OF RADAR TECHNOLOGY INTO COMMERCIAL SYSTEMS (Invited Paper)
TL;DR: In this article, the authors present a power MMIC power amplifiers are a significant performance and cost driver in modem radar systems, and the volume production is the key to controlling the processes and achieving repeatable high performance with high yield.
Proceedings ArticleDOI
The evolution of radar technology into commercial systems
TL;DR: In this paper, the basic technologies developed for military systems and how they have been modified or extended for commercial applications are discussed and examples of FET and HBT technology applied to commercial, airborne, weather radars and to wireless applications are presented.