Active antenna

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

5G intelligent front-end system and use method thereof

Abstract: The invention provides a 5G intelligent front-end system in the field of wireless communication. The 5G intelligent front-end system comprises a core network, an RRU, a digital/analog converter, a power amplifier group, a duplexer and an active antenna array; one end of the RRU is connected with the core network, and the other end of the RRU is connected with the digital/analog converter and the active antenna array; one end of the power amplifier group is connected with the digital/analog converter, and the other end of the power amplifier group is connected with the duplexer; the duplexer isconnected with the active antenna array; the invention also provides a use method of the 5G intelligent front-end system. The method has the advantages that the 5G data transmission efficiency is improved, and the 5G networking cost is reduced.

Implementation of a corner reflector antenna using frequency selective surfaces

Abstract: In this paper is presented the implementation of a corner reflector antenna where the reflective metal plates are replaced by frequency selective surfaces, FSS, based on the four-arm star geometry. The projected antenna an aperture angle of 60° and operation at 4.0 GHz. The design steps are described and numerical and experiments. For the region within the aperture angle, the corner reflectors with metallic plates and FSS presented practically the same results. The differences between numerical and experimental results in the region outside the angle region are discussed and justified. It is concluded that the use of FSS as reflectors in the corner reflecting antenna is feasible, which is very interesting considering the characteristics of the material (low weight and reduced volume) and the simplicity of the of the FSS. In addition, the antenna proposed in this work is potentially attractive, since it is possible to use FSS reconfigurable and, therefore, if an active antenna is obtained.

Analysis of a patch antenna coupled to a transmission line

Abstract: An analysis is developed for a patch antenna coupled to a transmission line. The coupling port is placed on the same side and the opposite side of the feeding end. A transmission line method is used to model the circuit. Experimental results are presented to verify the simulated results. Whether the coupling port is placed on the same side or the opposite side of the feeding end, the coupled power levels from the patch to the transmission line are almost the same. The coupling characteristics as a function of the gap and length variations are also identical for these two configurations.

Anticorrosive protection system for antenna glass, and corresponding antenna glass

Abstract: The invention relates to an anti-corrosive protection system for antenna glass having a conductive structure, said system comprising at least one multipolar line (4S, 4G) which is formed by structural parts arranged parallel to each other on the surface of the glass and is used to transmit signals HF and to connect an electronic element HF (3) to a supply voltage. According to the invention, one such system also comprises introduction means (9) for introducing an electric voltage (Up), or passivation voltage, located in the passivation region of the anti-corrosive material of the line, into the line (4S) and the electronic element HF (3, 3A), in addition to means (3B, 3W, 3S) for using said voltage (Up) as a supply voltage in the electronic element HF (3). The invention also relates to a method for using one such active antenna glass, and to an antenna glass thus equipped.

Antenna for near field communication, near field communication terminal having the same, radio frequency antenna, and ic card having the same

Abstract: An antenna for NFC(Near Field Communication), an NFC terminal having the same, an RF(Radio Frequency) antenna, and an IC(Integrated Chip) card having the same are provided to improve a receiving range and receiving safety by reducing loss of a signal and power transmitted from an active antenna. An antenna for NFC includes a first layer, a second layer, a third layer, a fourth layer, and at least one capacitor(7). An antenna coil which is wound by a plurality of wires is arranged on the same plane with the first layer substantially. The second layer is for ground shielding. The third layer is made of a plastic sheet. A receiving range extension coil which is separated from the antenna coil and forms an independent closed loop is arranged on the fourth layer. The capacitor is electrically connected to the receiving range extension coil. The capacitor forms a closed loop with the receiving range extension coil.