Beam up-tilt high-gain omnidirectional antenna

Abstract

The invention discloses a beam up-tilt high-gain omnidirectional antenna, which comprises a first sub-array and a second sub-array which are coaxially arranged, wherein array elements are U-shaped symmetric oscillators. A dielectric substrate is provided with feeding lead wires for connecting the oscillators of the first sub-array and the second sub-array, the first sub-array and the second sub-array are connected with feeding cables by means of the feeding lead wires, the characteristic impedance of the feeding cable connected with the first sub-array is Z01, the characteristic impedance of the feeding cable connected with the second sub-array is Z02, the input impedance of the first sub-array Zin1 equals the characteristic impedance of the feeding cable connected with the same, the inputimpedance of the second sub-array Zin2 equals the characteristic impedance of the feeding cable connected with the same, that is, Z01=Zin1, Z02=Zin2, the first sub-array is an M-element sub-array, the second sub-array is an N-element sub-array, the M and the N are natural numbers greater than or equal to 1, and the M and the N are not equal. The beam up-tilt high-gain omnidirectional antenna disclosed by the invention has the advantages of having ultra wideband, high gain, high power, high efficiency and simple structure, and being horizontally omnidirectional, beam up-tilt, light and portable, and economical and durable.

Description

【Technical field】 [0001] The present invention relates to an omnidirectional antenna device and technology, in particular to a miniaturized beam-up high-gain omnidirectional antenna suitable for a UAV ground control station and its technology. 【Background technique】 [0002] With the development of the aviation industry and information technology, human beings have entered the era of drones. UAVs are suitable for performing various tasks, and have the advantages of high cost performance, and have broad application prospects in both military and civilian fields. For military use, UAVs are used for map mapping, intelligence reconnaissance, battlefield surveillance, enemy attacks, relay communications, etc.; for civilian use, UAVs are used for aerial photography, logistics express and scientific exploration. At present, China is leading the world in the field of drones. Typically, drones rely on radio remote control from a ground station to perform various tasks. This wirele...

AI Technical Summary

Problems solved by technology

Usually, beamforming is implemented by array weighting, but it needs to design a complex feed network, resulting in decreased antenna gain, increased size, poor portability, and increased cost.

The decrease in gain will lead to problems such as shorter control distance and shorter airborne time of the UAV; the increase in size will lead to inconvenient maneuvering deployment and excessive wind load

Another solution is to use a series-fed oscillator array. The advantages of this solution are simple feeding, compact structure, and low cost. The disadvantages are low gain, narrow bandwidth, and the beam is tilted down instead of up.

Images