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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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Patent
01 Jan 2014
TL;DR: In this article, an active antenna waterproof radio frequency (AWRF) connector for a ship is described, which consists of a base (11), a first insulator (3), and a contact (1).
Abstract: Disclosed is an active antenna waterproof radio-frequency connector for a ship. The active antenna waterproof radio-frequency connector comprises a base (11), a first insulator (3) and a contact (1). The active antenna waterproof radio-frequency connector is characterized in that the boss end of the first insulator (3) is inserted into a mounting hole of the base (11), the end face, provided with a boss, of the first insulator (3) abuts against the surface of the base (11), the rod portion of the contact (1) penetrates through a through hole in the first insulator (3) to extend into the base (11), the part, located in the base (11), of the rod portion of the contact (1) is sequentially sleeved with a second insulator (6) and a nut (8), the nut (8) is used for fixing the part, located in the base (11), of the rod portion of the base (11), and a welding terminal (9) is fixed to the end face of the part, located in the base (11), of the rod portion of the contact (1); the other end of the contact (1) is provided with an inner screw hole (20) which is connected with an inner screw of an antenna (14) and external threads (16) which are matched with internal threads (15) on a nut cap (17) for fixing the antenna (14). The active antenna waterproof radio-frequency connector for the ship can be widely applied to waterproof electric connection of various outdoor electronic products, and meanwhile, small distribution electric parameters of contact grounding are kept.

1 citations

Patent
14 Mar 2019
TL;DR: In this article, the authors describe a method performed by a communication node (103) for enabling OTA testing, where the communication node comprises at least one active antenna (310) and the active antenna scans two or more directions when emitting the radiation pattern.
Abstract: The embodiments herein relate to a method performed by a communication node (103) for enabling OTA testing. The communication node (103) comprises at least one active antenna (310). The communication node (103) transmits a test signal OTA by emitting a radiation pattern from the active antenna (310). The active antenna (310) scans two or more directions when emitting the radiation pattern.

1 citations

01 Jan 1994
TL;DR: A new planar transponder integrating a self-oscillating mixer (SOM) and active antennas is presented that employed both as a resonant antenna for receiving the RF signal and for constructing the balanced mixer.
Abstract: employed both as a resonant antenna for receiving the RF signal and for constructing the balanced mixer. In order to further minimize the complexity of the circuit, the receiving Part ofthe mansponder was designed using only one as a single ended SOM. 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.

1 citations

Proceedings ArticleDOI
14 Apr 1997
TL;DR: In this article, the phase and amplitude characteristics of an active circular loop antenna with two crossed loops are investigated, where the antenna aerials are connected to preamplifiers which increase effective height and also match them to the rest of the measurement system.
Abstract: The purpose of this paper is to present the phase and amplitude characteristics of an active loop antenna, which can be easily fitted into a polarization diversity sensor built with two crossed loops. We shall first consider the determination of the intrinsic complex effective height of the loop, taking into account the propagation effects of an incoming wave from the ionosphere. The antenna aerials are connected to preamplifiers which increase effective height, and also match them to the rest of the measurement system. In a second part, we show how the complex effective height is modified after passage through the preamplifier. These developments are illustrated by experimental measurements which take into account of the phase and amplitude of several incoming HF skywaves, identified by their direction of arrival and polarization. Finally, the performances in terms of antenna factor, of a small active circular loop antenna (radius 0.65 meters) are compared with those of an eight meter high passive biconical antenna.

1 citations

Journal ArticleDOI
TL;DR: This paper reviews some of the recent efforts in the area of microwave–optical interactions applied to active integrated antennas and arrays and demonstrates optical control of microwave devices in active antenna circuits.
Abstract: This paper reviews some of the recent efforts in the area of microwave–optical interactions applied to active integrated antennas and arrays. Two optical–microwave techniques and examples of their application are presented. First, antenna remoting via optical means is discussed. Second, optical control of microwave devices in active antenna circuits is demonstrated.

1 citations


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