antenna

Abstract

The invention provides an antenna, including a signal transmitting and receiving unit, a phase-shifting feed unit, a signal transmitter and a signal receiver, the signal transmitting and receiving unit includes two vertically arranged radiation groups, and the phase-shifting feeding unit includes a signal The transmitting port, the signal receiving port and multiple connection ports, the transmitting signal of the signal transmitter passes through the phase-shifting feed unit to generate two transmitting signals with a phase difference of 90°, which are respectively sent to two radiation groups for radiation synthesis Transmit circularly polarized waves; the two radiation groups are also used to receive circularly polarized waves that are opposite to the direction of the transmitted circularly polarized waves, and induce one induction signal respectively, and the phase difference between the two induction signals The angle is 90°, and the two induction signals are synthesized into the receiving signal at the signal receiving port after being acted on by the phase-shifting feed unit. The antenna of the present invention can still realize real-time transmission and reception when transmitting and receiving at the same frequency, and can reduce frequency occupation of bandwidth, so that the antenna occupies less spectrum resources.

Description

technical field [0001] The invention relates to the technical field of radio ranging, in particular to an antenna. Background technique [0002] In low-power ultra-wideband radio ranging equipment, it is generally required that the antenna can transmit and receive radio signals at the same time. The radio signal received by the receiving antenna includes the self-interference signal emitted by itself and the reflected signal of the distant target. The strength of the self-transmitted signal is often much greater than the reflected signal, which may burn out the receiver's low-noise amplifier and other electronic circuits. Therefore, it is necessary to minimize the receiving antenna from receiving the self-transmitted signal. In addition, in order to improve the detection distance and the signal-to-noise ratio of the echo signal, it is also necessary to reduce the strength of the self-interference signal. Both of the above two requirements need to improve the transceiver is...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an antenna, aiming to solve the problem of poor isolation when the small antenna used for low-power ultra-wideband radio ranging in the prior art transmits and receives in real time at the same frequency

Images