Topic
Active antenna
About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.
Papers published on a yearly basis
Papers
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TL;DR: A reconfigurable parasitic patch array is designed to provide polarization and pattern diversities and the performance of the device is predicted using a commercial simulator including a pin diode modelling and an optimization procedure of the switched loads based on an equivalent flow graph.
Abstract: A reconfigurable parasitic patch array is designed to provide polarization and pattern diversities. The performance of the device is predicted using a commercial simulator including a pin diode modelling and an optimization procedure of the switched loads based on an equivalent flow graph. Measurements of the correlation factor and the diversity gain in an indoor environment are performed with a dedicated platform for two orientations of the antenna.
49 citations
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29 Apr 2004TL;DR: In this article, an antenna arrangement (216) and a base transceiver station (250) are provided, where an active antenna (200A, 200B) connected to a local unit (234) for performing conversion between a low-frequency digital signal (212A, 212B) and the radio frequency electromagnetic field (206A, 206B) comprising an antenna element (202A, 202B), and a transceiver (208A, 208B) coupled and integrated at least partially with the antenna element.
Abstract: An antenna arrangement (216) and a base transceiver station (250) are provided. The base transceiver station (250) comprises at least one active antenna (200A, 200B) connected to a local unit (234) for performing conversion between a low-frequency digital signal (212A, 212B) and a radio frequency electromagnetic field (206A, 206B) comprising an antenna element (202A, 202B) for performing conversion between a radio frequency signal (204A, 204B) and the radio frequency electromagnetic field (206A, 206B), and a transceiver (208A, 208B) coupled and integrated at least partially with the antenna element (202A, 202B) for performing conversion between the low-frequency digital signal (212A, 212B) and the radio frequency signal (204A, 204B).
49 citations
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TL;DR: In this article, an inset-fed antenna with shorting pin and slots was presented for harmonic suppression of an active integrated antenna, whose fundamental resonant frequency is 5.8 GHz.
Abstract: An inset-fed antenna with a shorting pin and slots is presented for harmonic suppression of an active integrated antenna. Its fundamental resonant frequency is 5.8 GHz. At fundamental and harmonic frequencies, return loss and radiation characteristics are measured and compared with those of the conventional microstrip patch antenna. The second and third harmonic return losses of the proposed antenna are suppressed to 6.7 dB and 17.7 dB with respect to the conventional patch antenna, respectively.
48 citations
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TL;DR: In this paper, a cavity-backed, Gunn-diode-driven, self-mixing active inverted stripline circular patch antenna has been developed, which provides good radiation performance with cross-polarization levels 18 dB below copolarization at boresight.
Abstract: A cavity-backed, Gunn-diode-driven, self-mixing active inverted stripline circular patch antenna has been developed. The antenna provides good radiation performance 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 single-sideband noise figure of 12 dB at 200 MHz. The self-mixing antenna is also capable to mix signals with its second-harmonic, providing a conversion loss of 3.7 dB. Also, a varactor diode has been incorporated with a inverted stripline circular patch active antenna to allow for electronic tuning. A 13% tuning bandwidth with a power variation of 11.0 dB was achieved. A simple equivalent circuit has been used to model the active antenna, and the calculated results agree well with the experimental results. The circuit should have many commercial applications in wireless communications, radar, and sensors, but is particularly suitable for use as a transceiver for short communications links or as a microwave identification transceiver.
48 citations
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09 Jun 2007TL;DR: It is demonstrated that the active instead of the passive antenna reflection coefficient is the key parameter in realizing low-noise receiver designs.
Abstract: In this paper it is demonstrated that the active instead of the passive antenna reflection coefficient is the key parameter in realizing low-noise receiver designs.
48 citations