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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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Patent
27 Apr 2011
TL;DR: In this article, the authors describe an integrated active antenna radiator, which is characterized by comprising a substrate and radiating fins which are produced on one surface of the substrate, wherein the other surface is provided with at least one active module mounting hole.
Abstract: The invention discloses an integrated active antenna radiator. The integrated active antenna radiator is characterized by comprising a substrate and radiating fins which are produced on one surface of the substrate, wherein the other surface of the substrate is provided with at least one active module mounting hole; and the radiating fins are arranged corresponding to the active module mounting hole. The integrated active antenna radiator has the advantages of bringing heat dissipation effect in a limited space into effect to the greatest extent, enhancing the water-proof effect of an active antenna, greatly reducing production cost and the like.

9 citations

Proceedings ArticleDOI
11 Jun 2006
TL;DR: In this paper, a flip-chip-based slot antenna is presented which is realized using flipchip technology and allows integration of active chips into the antenna and exhibits resonant properties that can be used as an input/output filter.
Abstract: A novel slot antenna is presented which is realized using flip-chip technology and allows integration of active chips into the antenna. It is compatible with conventional planar assembly methods and exhibits resonant properties that can be used as an input/output filter. Combining 4 antennas one obtains a compact module with beam switching in all lateral directions. For 24 GHz, only 12 mm side length are required. The paper describes antenna design and presents measurement results of a 24 GHz version with integrated transmitter VCO.

9 citations

Patent
03 Apr 1998
TL;DR: In this paper, a magnetic field sensor which can be used as an active antenna is disclosed that is capable of small size, ultrawideband operation, and high efficiency, including a multiplicity of magnetic field transducers, e.g., superconducting quantum interference devices (SQUIDs) or Mach-Zehnder modulators, that are electrically coupled in a serial array.
Abstract: A magnetic field sensor which can be used as an active antenna is disclosed that is capable of small size, ultrawideband operation, and high efficiency. The sensor includes a multiplicity of magnetic field transducers, e.g., superconducting quantum interference devices (SQUIDs) or Mach-Zehnder modulators, that are electrically coupled in a serial array. Dummy SQUIDs may be used about the perimeter of the SQUID array, and electrically coupled to the active SQUIDs for eliminating edge effects that otherwise would occur because of the currents that flow within the SQUIDs. Either a magnetic flux transformer which collects the magnetic flux and distributes the flux to the transducers or a feedback assembly (bias circuit) or both may be used for increasing the sensitivity and linear dynamic range of the antenna.

9 citations

Proceedings ArticleDOI
13 May 1997
TL;DR: In this paper, a millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic with the best lens design was manufactured and characterized by measuring the scattering parameters between the beam and array ports within the frequency interval of interest.
Abstract: A millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic. Various lens designs were evaluated with a computer model based on the contour integral method. The best lens design was manufactured and characterized by measuring the scattering parameters between the beam and array ports within the frequency interval of interest. The measured S-parameters were processed to determine beam sidelobes and insertion loss. Maximum sidelobe levels /spl les/-30 dB were obtained. The insertion loss of the lens was between 0.8 and 23 dB depending on the particular beam port that was excited and the operating frequency. The current lens design has 32 active antenna element array ports, 17 active beam ports, and a maximum scan angle of /spl plusmn/22.2.

9 citations

Journal ArticleDOI
TL;DR: In this paper, an active four-element patch antenna, backed by four GaAs monolithic-microwave integrated-circuit (MMIC) 4.4GHz oscillators, self-locked by mutual coupling through a lumped capacitive ring MMIC network, has been designed, fabricated, and tested.
Abstract: In this paper, an active four-element patch antenna, backed by four GaAs monolithic-microwave integrated-circuit (MMIC) 4.4-GHz oscillators, self-locked by mutual coupling through a lumped capacitive ring MMIC network, has been designed, fabricated, and tested. The sequentially rotated arrangement given here when augmented with a lumped capacitive coupling network suggests that in-phase oscillator entrainment is guaranteed so that spatial power combination by the antenna array occurs with circular polarization characteristics.

9 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202148
2020113
2019123
201898
201789
2016102