Topic
Active antenna
About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.
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10 Jul 1995
TL;DR: In this article, a dual polarised slotted waveguide array antenna is presented for an advance synthetic aperture radar with polarimetric capabilities, and a breadboard antenna example is presented at 9.6 GHz having a scan range of /spl plusmn/23/spl deg/ transverse the subarray axis.
Abstract: Presents a novel dual polarised slotted waveguide array antenna. It is intended for an advance synthetic aperture radar with polarimetric capabilities. Special emphasis is given to achieve a compact subarray design with large bandwidth, high polarisation purity, low loss and high port to port isolation. A breadboard antenna example is presented at 9.6 GHz having a scan range of /spl plusmn/23/spl deg/ transverse the subarray axis.
23 citations
23 May 1994
TL;DR: A new planar transponder integrating a self-oscillating mixer (SOM) and active antennas is presented and was successfully operated up to 2 m.
Abstract: A new planar transponder integrating a self-oscillating mixer (SOM) and active antennas is presented. The receiving active antenna combines a FET SOM with a patch antenna and the transmitting antenna is combined with the IF amplifier. The transponder was successfully operated up to 2 m. The design concept and the experimental result are discussed. >
22 citations
Patent•
17 Jun 2005TL;DR: In this paper, a low profile smart antenna includes an active antenna element carried by a dielectric substrate, and the passive antenna elements have an inverted L-shaped portion laterally adjacent the active antenna.
Abstract: A low profile smart antenna includes an active antenna element carried by a dielectric substrate, and active antenna element has a T-shape. Passive antenna elements are carried by the dielectric substrate, and they have an inverted L-shaped portion laterally adjacent the active antenna element. Impedance elements are selectively connectable to the passive antenna elements for antenna beam steering.
22 citations
Patent•
30 Mar 2004TL;DR: In this article, an active antenna that delivers a data-bearing signal having a signal quality at least as good as any of the antennae may be selected based upon measurements of the signal quality during a preamble field of data frames having a substantially longer preambble field than other data frames.
Abstract: A radio frequency transceiver for a wireless local area network (LAN) may have two or more antennae. An active antenna that delivers a data-bearing signal having a signal quality at least as good as any of the antennae may be selected based upon measurements of the signal quality during a preamble field of data frames having a substantially longer preamble field than other data frames.
22 citations
Patent•
21 Sep 1988TL;DR: In this paper, an improved, dual frequency transmit-receive module is proposed for use with two harmonically related frequencies. But, this module has specific application to active aperture radar systems utilizing one antenna means for each individual TRS in an active antenna array.
Abstract: An improved, dual frequency transmit-receive module operable for use with two harmonically related frequencies. This dual frequency transmit-receive module utilizing; a push-pull class B power amplifier having dual output ports, a standard frequency mixer and a harmonic mixer, is operable to transmit or receive an original frequency as well as a second harmonic of that same frequency, simultaneously or at distinct, discrete intervals. This improved dual frequency transmit-receive module is operable in any radar system, using only one, or a multiplicity of antennas. However, this transmit-receive module has specific application to active aperture radar systems utilizing one antenna means for each individual transmit-receive module in an active antenna array.
22 citations