Antenna

Abstract

The invention discloses an antenna. The antenna comprises a reflecting plate, and a plurality of single-polarity micro-strip vibrators arranged on the reflecting plate; each single-polarity micro-strip vibrator comprises a main PCB; two micro-strip radiating areas are symmetrically formed in the main PCB; each micro-strip radiating area comprises a micro-strip upper arc side and a micro-strip lower arc side which are closed to form a closed area; a plurality of independent micro-strip units with 1 / 2 wavelength are arranged in each micro-strip radiating area. The antenna shows outstanding communication electrical parameter performances between the frequency band from 800 to 950MHz; the front-to-back ratio of the minimum frequency point of single radiating unit is more than 31dB; the front-to-back ratio of the minimum frequency point of single radiating unit under 950MHz is 36dB; the low-frequency-point gain is more than 9.35dBi; the average gain in the band is more than 9.8dBi.

Description

technical field [0001] The present invention relates to the communication field, in particular to an antenna. Background technique [0002] At present, microstrip antennas have become the mainstream in communication, especially miniaturized antennas. An antenna is a device that converts high-frequency current into radio waves and transmits them into space, and at the same time collects space radio waves and generates high-frequency currents. The antenna can be regarded as a tuned circuit composed of capacitance and inductance; at certain frequency points, the capacitance and inductance of the tuned circuit will cancel each other out, and the circuit will show pure resistance. This phenomenon is called resonance, and the resonance phenomenon corresponds to The working frequency point is the resonant frequency point, and the energy at the resonant frequency point of the antenna has the strongest radiation characteristics; the antenna structure with resonant characteristics is...

AI Technical Summary

Problems solved by technology

The antenna can be regarded as a tuned circuit composed of capacitance and inductance; at certain frequency points, the capacitance and inductance of the tuned circuit will cancel each other out, and the circuit will show pure resistance. This phenomenon is called resonance, and the resonance phenomenon corresponds to The working frequency point is the resonant frequency point, and the energy at the resonant frequency point of the antenna has the strongest radiation characteristics; the antenna structure with resonant characteristics is called an antenna oscillator, and the antenna structure directly excited by high-frequency current is called an active Vibrator, otherwise called passive vibrator; existing vibrator, including physical vibrator and microstrip vibrator, when designing the antenna according to the needs of actual use, in order to make the resonant frequency point of the antenna meet the set requirements, it is necessary to adjust the resonant frequency point of the antenna The input impedance is adjusted. The adjusted oscillator and the ordinary oscillator still cannot meet the requirements of the current communication standard. The current communication standard is getting higher and higher, and the requirements for the microstrip oscillator are also getting higher and higher. The gain and directivity of the current oscillator , front-to-back ratios need breakthroughs, and the most important thing is to achieve the above-mentioned breakthroughs under the premise of miniaturization

Images