Broadband compact type microstrip array antenna

Abstract

The invention discloses a broadband compact type microstrip array antenna. An even number of lines of microstrip patches and an even number of columns of microstrip patches are arranged on a dielectric substrate; two x-direction series-wound feedback networks which are connected together through a feedback structure are arranged on the dielectric substrate along an x-axis direction; the x-direction series-wound feedback networks divide the even number of columns of microstrip patches into two parts; the microstrip patches on the left part and the microstrip patches on the right part of each row are connected with adjacent y-direction series-wound feedback networks to form a sub array; the microstrip patches of the left side sub array in each row and the microstrip patches for forming the right side sub array in each row are connected with one y-direction series-wound feedback network separately to feed; the left side sub arrays in each row are connected with the right side sub arrays in each row in parallel; two sub arrays, which are adjacent along the x direction, of the 1 / 2 antenna array up and down are connected in series; and the array formed by the microstrip patches on the upper half part of the dielectric substrate and the array formed by the microstrip patches on the lower half part of the dielectric substrate are connected in parallel along the x-axis direction through the feed structure.

Description

technical field [0001] The invention relates to the technical field of microstrip array antennas, in particular to a broadband compact microstrip array antenna. Background technique [0002] With the rapid development of modern communication systems, the volume of communication equipment has been continuously reduced, and the communication frequency band has been continuously developed to wide-band and high-frequency bands. miniaturization and broadband development. [0003] Microstrip antennas are favored by people because of their small size, light weight, low profile, flexible feeding methods, low cost, and easy to conform to aircrafts. However, traditional microstrip antennas have narrow impedance bandwidths. The bandwidth of the antenna is only about 5%. The narrow-band characteristic of the traditional microstrip antenna has become the main obstacle to limit its wide application, so it is of great significance to widen the bandwidth of the microstrip antenna. In rec...

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Problems solved by technology

However, these methods have certain shortcomings, such as the high cost of using a thick substrate, the use of a substrate with a low dielectric constant is large in size, which is not conducive to miniaturization, the design of a multi-layer structure is complicated, and the assembly cost is too high. The patch antenna leads to the distortion of the radiation pattern and the problem of polarization impurity

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