Dual Circularly Polarized Microstrip Antenna with Wide Bandwidth and Angular Scanning
A technology of wide-angle scanning and dual circular polarization, which is applied in the fields of microwave communication, modern radar system, radio frequency identification, microwave, and electronic equipment. Large size, complex process and structure, etc., to achieve the effect of being suitable for mass production and assembly, compact structure, convenient adjustment and maintenance
Active Publication Date: 2016-04-06
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology
From a structural point of view, the horn antenna is very large in size and weight; although the cross Vivaldi antenna has a wide bandwidth, it is large in size and high in profile; the microstrip patch antenna has the advantages of light weight, small size, easy processing and integration. It has been widely used in design, but limited by its planar form, the impedance bandwidth of a single-layer microstrip patch antenna is difficult to exceed 15%, and its performance is particularly limited when used for wide-angle scanning; as for the dipole antenna form, a cross can also be used Crossed metal arm oscillator, but the metal oscillator and feeder process and structure are complex, and the weight is much heavier than the microstrip form, especially for lower frequencies
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Embodiment 1
[0034] This embodiment provides an active phased array antenna design, the working frequency is 2.1GHz~2.6GHz, the polarization mode is left-handed circular polarization and right-handed circular polarization, and the array form adopts the row-column spacing of 61.5mm and 71mm The triangular grid, with a scanning pitch angle of ±60°, is required to have good shock and vibration resistance and dust and moisture resistance.
[0035] see figure 1 and figure 2 , the dual circularly polarized microstrip antenna with wide bandwidth and angular scanning includes a base 4, two crossed microstrip plates and a radome 1; the two microstrip plates are A-type microstrip plate 2 and M-type microstrip plate 3; A-type microstrip plate 2 and M-type microstrip plate 3 are flat plates of the same size, both of which have the same thickness t =0.762mm, relative permittivity ε r =2.94 microstrip plate, and the upper part is provided with a cut angle according to the inclination of the vibra...
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The invention relates to a double circular polarized microstrip antenna with the broadband wide-angle scanning function. The double circular polarized microstrip antenna comprises a base, two crossed microstrip plates and an antenna cover. Feeder lines, balun and antenna elements are arranged on the two microstrip plates respectively. The base is of a round box shape, and the top of the base is opened. The two crossed microstrip plates are fixed into the base, and two port holes are formed in the bottom of the base. The antenna cover is of a round cover shape, the bottom of the antenna cover is opened, a parasitic radiation sheet is integrated in the cover, and the antenna cover covers the base. The double circular polarized microstrip antenna is wide in working frequency band, and the relative bandwidth of which standing waves are smaller than or equal to 3 exceeds 40%; the double circular polarized microstrip antenna is wide in application frequency band, and the structure is adopted in the center frequency ranging from 0.5 GHz to 5 GHz; when the double circular polarized microstrip antenna is used as a 21% bandwidth phase array and scans + / -60-degree elevation, the angle scanning range is wide, and omnibearing scanning active standing waves do not exceed 1.9; the double circular polarized microstrip antenna is small in size, and the diameter of the double circular polarized microstrip antenna is 0.4 of the wavelength; the double circular polarized microstrip antenna is stable and reliable in structure and has good anti-seismic performance, dustproof properties and humidity resistance.
Description
technical field [0001] The patent of the invention relates to a wide-band dual circularly polarized antenna suitable for wide-angle scanning, which belongs to the field of microwave technology and can also be used in microwave communication, modern radar systems, radio frequency identification, electronic equipment and other fields. technical background [0002] Antennas are important components of systems such as wireless broadcasting, wireless communication, and wireless detection. The performance of antenna units and antenna arrays directly reflects and largely affects the performance of the entire system. With the rapid development of active phased array technology, radar and other systems have higher and higher requirements for frequency bandwidth and scanning angle, which also put forward higher and higher requirements for the function and performance of the antenna. [0003] For circularly polarized antennas, the commonly used forms include horn antennas, cross Vivald...
Claims
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IPC IPC(8): H01Q13/08H01Q21/24H01Q1/50
Inventor 周子成李雁余峰卢晓鹏
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST