Active antenna

About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.

Method and device for generating at the same time many antena patterns capable of being controlled at real time

Abstract: PURPOSE: To attain antenna control of a multi-channel antenna by using an antenna consisting of an active microwave radiation device conducting direct radiation and controlling the microwave radiation device with an optical beam forming circuit network. CONSTITUTION: The optical beam forming circuit network is placed between a microwave channel and amplifiers being components of an radiation device, and the optical beam forming circuit network is made up of an antenna control section, a distribution circuit network, a phase shift setting section and an amplitude adjustment section, and the antenna control section calculates for the phase shift setting section and the amplitude adjustment section. Furthermore, the distribution circuit network and the phase shift setting section are configured by using microwave components and optical and electrooptic components, a microwave signal is converted into an optical signal at an input terminal of the beam forming circuit network and the optical signal is converted again into the microwave signal at an output terminal of the beam forming circuit network. Thus, an active antenna whose phase is controlled is used and sends/receives lots of channel is different directions or in the same direction. Thus, lots of antenna axes able to be controlled in real time are generated.

Vehicle-mounted navigation and radio antenna

Abstract: The utility model discloses a vehicle-mounted navigation and radio antenna, and the antenna consists of a housing, an active navigation antenna assembly, and a radio antenna low-noise amplifier assembly. The interior of the housing is provided with two nest sites, wherein one nest site is used for placing an AM/FM radio active antenna, and the other nest site is used for placing a GPS active navigation antenna or a GPS and Beidou (BDS) dual-mode active navigation antenna. According to the utility model, the GPS, BDS, AM and FM antennas are placed in the housing, and serve as one antenna assembly, thereby achieving the four-in-one antenna function. The antenna is simple in structure, is low in cost, and is convenient to install.

Multi-mode miniature active antenna applicable in satellite navigation positioning system

Abstract: The utility model relates to the technical field of antennas, and specifically relates to a multi-mode miniature active antenna applicable in a satellite navigation positioning system The multi-mode miniature active antenna comprises a high-dielectric-constant ceramic substrate, a metal radiation unit patch, a metal ground, a feed probe and a low-noise amplifier, wherein the metal radiation unit patch is arranged on an upper surface of the high-dielectric-constant ceramic substrate, the metal ground is arranged on a lower surface of the high-dielectric-constant ceramic substrate, the bottom of the feed probe passes through the high-dielectric-constant ceramic substrate and is inserted into a central hole of the low-noise amplifier and back-to-back welded with the low-noise amplifier, the top of the feed probe is connected with the metal radiation unit patch on the upper surface of the high-dielectric-constant ceramic substrate by soldering, and the low-noise amplifier can be externally connected with satellite navigation equipment The multi-mode miniature active antenna provided by the utility model has the advantages of simple structure, small size, low cost and high performance, and can be directly connected and used with a system radio-frequency module

Frequency-switchable active antenna system and control method thereof

Abstract: An active antenna system includes a printed circuit board, an antenna radiation element, a metal ground surface, and a first switching circuit. The printed circuit board has an antenna clearance region. The antenna radiation element has a feed port, a first physical position and a second physical position. The metal ground surface is formed on a first layer of the printed circuit board and outside the antenna clearance region. A first terminal of the first switching circuit is connected to the first physical position. A second terminal of the first switching circuit is connected to the second physical position. A control terminal of the first switching circuit receives a control signal. The first physical position and the second physical position are selectively connected with each other or disconnected from each other according to the control signal.