Rectangular-slot-loaded thin monolayer medium broadband microstrip patch antenna

Abstract

The invention discloses a rectangular-slot-loaded thin monolayer medium broadband microstrip patch antenna. The rectangular-slot-loaded thin monolayer medium broadband microstrip patch antenna basically comprises a microstrip path, an impedance matching microstrip line, a feed microstrip line and a medium substrate, wherein the medium substrate is thin and monolayer and low in relative dielectric constant and provided with the rectangular microstrip patch. The middle of the microstrip patch is provided with three rectangular loaded slots including the first loaded slot, the second loaded slot and the third loaded slot which are uniform in size and provided with two parallel left and right narrow sides, the right narrow side of the microstrip patch is provided with a feed port at the upper end, the feed port is connected with the impedance matching microstrip line, the left end of the impedance matching microstrip line is connected with the feed port, and the other end of the impedance matching microstrip line is connected with the feed microstrip line. By the loaded slots and the microstrip line technology with impedance matching, multi-resonance frequency is realized, the microstrip medium substrate low in relative dielectric constant is used to broaden bandwidth of the antenna, and the feed microstrip line is coplanar with the microstrip patch. The rectangular-slot-loaded thin monolayer medium broadband microstrip patch antenna has the advantages of simple structure, easy machining and plane array.

Description

technical field [0001] The invention relates to the technical field of single-layer microstrip patch antennas, in particular to a thin single-layer dielectric broadband microstrip patch antenna loaded with rectangular slots. Background technique [0002] The demand for broadband antennas in military and civilian fields is more and more extensive. In some practical applications, there are strict requirements on the antenna array such as volume, weight, efficiency and environmental adaptability. For example: for airborne / satellite platforms, antennas are required to have a thin profile, light weight, high efficiency and meet certain environmental application conditions. [0003] There are many types of radiating antennas suitable for planar antenna arrays, mainly waveguide slot antenna arrays, printed dipoles, and microstrip patch antenna arrays. The waveguide slot antenna array has high efficiency, but it is heavy in weight and high in processing cost; the printed dipole an...

AI Technical Summary

Problems solved by technology

Patch antenna units with this type of structure have inherent defects when forming a large planar antenna array (not a two-dimensional large-angle scanning array): each radiating unit is fed by a probe, which is not conducive to processing, and a large number of probes and The vertical solder joints between the microstrip patches reduce the reliability of the system; in order to form a planar array, an additional power division network is still required; in addition, the thickness of the dielectric plate of these antenna elements is usually thick, thus increasing the weight of the antenna

The disadvantages of this type of antenna are: the depth of the metal back cavity is related to the wavelength, and a back cavity must be added after each unit, resulting in a relatively large weight of the antenna, complex structure and processing technology, etc.

[0009] 4. Other electromagnetic coupling fed microstrip patch antennas such as L-shaped microstrip and terminal loading have structural defects similar to the above items

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