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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.


Papers
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Proceedings ArticleDOI
01 Jun 2014
TL;DR: This work demonstrates the feasibility of fully-integrated and compact sub-mmW transceiver implementations using SiGe technology and implemented in an advanced SiGe HBT platform, and which has on-chip antennas.
Abstract: We present a 314 GHz transmitter and receiver chipset which is implemented in an advanced SiGe HBT platform, and which has on-chip antennas. The transmitter uses an active antenna structure, where the generated on-chip signal is directly fed into the antenna. The receiver consists of a novel sub-harmonic resistive mixer with an on-chip high-power differential signal source feeding the LO port. A test link which directly connects the transmitter to the receiver was also implemented as a reference for characterization. This reference circuit enables a simple and accurate measurement method for conversion loss and antenna gain by omitting external high frequency signal sources. To further facilitate the characterization, the utilized on-chip signals were implemented and tested separately as well. The receiver achieves 22.5 dB conversion loss and the transmitter generates a signal power of -8 dBm at 314 GHz. On-die end-fire antennas were designed for both transmit and receive paths, and utilize a substrate etching technology to boost performance. This work demonstrates the feasibility of fully-integrated and compact sub-mmW transceiver implementations using SiGe technology.

17 citations

Patent
18 Nov 2015
TL;DR: In this article, a multicast system radio resource optimal distribution method based on an active antenna array model is proposed, which comprises the steps as follows: performing cluster processing to a user based on position information of the user and video request information estimated in current time period.
Abstract: The invention discloses a multicast system radio resource optimal distribution method based on an active antenna array model. The method comprises the steps as follows: performing cluster processing to a user based on position information of the user and video request information estimated in current time period; calculating a horizontal azimuth angle and a vertical elevation angle of the central position of each user group according to the user cluster result and position information of each user group; accurately aligning the user group with a base station antenna beam; using an antenna model of an active antenna array and determining a channel gain model from the base station to the user; providing a carrier resource distribution model based on the target of maximizing throughput capacity; providing a user group clustering algorithm, and performing clustering processing to the user group according to the position information of the user group. On the basis of carrier distribution algorithm of maximizing the throughput capacity, the method of the invention improves spectrum effectiveness, resource utilization rate, system capacity and user performance.

16 citations

Journal ArticleDOI
TL;DR: In this article, a patch-antenna coupler formed by placing one or two open-ended microstrip lines (coupled lines) near and along the nonradiating edge(s) of a patch antenna is demonstrated.
Abstract: This paper proposes a novel amplifying antenna array using the patch-antenna coupler formed by placing one or two open-ended microstrip lines (coupled lines) near and along the nonradiating edge(s) of a patch antenna. An X-band five-element array with broadside 25-dB Chebyshev radiation is demonstrated. When the input signal is fed to the center element, with most of the power radiating from the antenna, part of it is tapped to the coupled lines, amplified by an FET amplifier, and fed to the next antenna element. This process is repeated after all the antenna elements are fed with suitable power. The amplitude distribution of the fields radiated from the antennas is controlled by the coupling coefficient from the patch to the coupled line, which, in turn, is governed by the coupling length and gap between the patch and line. The measured return loss of the designed five-element array is -27 dB at the center frequency of 10 GHz with 2% 10-dB bandwidth. The radiation pattern possesses a transmitting gain of 15.9 dB, a half-power beamwidth of 17/spl deg/, and a sidelobe level of -22 dB.

16 citations

Proceedings ArticleDOI
01 Dec 2009
TL;DR: In this paper, a dual-port dual-band annular slot antenna was designed for use in the feed-back path of an oscillator resulting in an active antenna configuration.
Abstract: This report presents the design of a dual-port dual-band annular slot antenna suitable for use in the feed-back path of an oscillator resulting in an active antenna configuration. The proposed antenna is designed to radiate and transmit equal amounts of power. The return loss of the proposed antenna is higher than that desired for one-port antenna application at the desired dual-band frequencies. The antenna is fabricated on one side of a Neltec substrate (e r =3.2 and thickness = 0.762 mm) and the microstrip feeding line is fabricated on the opposite side of the board. The antenna was designed to operate at WLAN bands centered at 2.4 and 5.2 GHz. The simulated and measured results show fairly good agreement. The measured return losses were found 20.5 dB at 2.4 GHz and 13.9 dB at 5.2GHz while simulated return losses were 9.36 dB at 2.4 GHz and 31.35 dB at 5.2 GHz. The radiation pattern is approximately omnidirectional at both frequencies in H-plane.

16 citations

Patent
Teck Hu1
02 Nov 2012
TL;DR: In this article, the authors provide a method and apparatus for translating testing requirements between different reference points, such as a first requirement associated with a first reference point and a second requirement associated to a second reference point that differs from the first reference points.
Abstract: Embodiments of the claimed subject matter provide a method and apparatus for translating testing requirements between different reference points. Some embodiments of the method include generating mapping information that relates at least one first requirement associated with an active antenna array to at least one second requirement associated with the active antenna array. The first requirements are associated with a first reference point and the second requirements are associated with a second reference point that differs from the first reference point. Some embodiments of the method also include storing the mapping information in a non-transitory computer-readable storage media.

16 citations


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