A miniaturized compact vertical polarization end-fire microstrip antenna

By simplifying the structure of the microstrip antenna design and utilizing a high dielectric constant substrate and patch length adjustment, a compact vertically polarized end-fire radiation is achieved, solving the problems of complex structure and large size of existing antennas. This makes it suitable for high-speed mobile carrier communication on metal platforms.

CN122370699APending Publication Date: 2026-07-10NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Filing Date
2026-05-07
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing patch-type end-fire antennas are complex in structure and large in size, making it difficult to achieve vertically polarized end-fire radiation while maintaining a compact design, and they are also difficult to attach directly to a metal plane for use.

Method used

An upper radiating structure consisting of a first patch and a second patch, an intermediate dielectric substrate, and a lower metal ground plane are adopted. By adjusting the patch length and coupling gap, end-radiation of the TM10 or TM01 mode can be achieved, simplifying the structure. The high dielectric constant dielectric substrate is used to bring the patch radiating edge spacing closer, eliminating the need for a reflector unit.

Benefits of technology

A compact, low-profile, and easy-to-manufacture vertically polarized end-fire microstrip antenna has been developed, featuring high-end-fire gain and a large front-to-back ratio, making it suitable for wireless communication on high-speed mobile carriers and expanding its application scenarios.

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Abstract

The application discloses a miniaturized compact vertical polarization end-fire microstrip antenna, which comprises an upper layer radiation patch structure, a middle layer dielectric substrate and a lower layer metal ground plate; the upper layer radiation patch structure is composed of a first patch serving as a driver and a second patch serving as a director; the first patch and the second patch are linearly arranged on the upper surface of the dielectric substrate along the end-fire direction and work at the fundamental TM 10 mode or TM 01 mode; the relative dielectric constant of the middle layer dielectric substrate is greater than or equal to 8, so as to shorten the distance between the first patch and the second patch working at the fundamental TM 10 mode or TM 01 mode; the equivalent magnetic current interval distance between the two radiation edges of the respective patches of the first patch and the second patch; the end-fire direction radiation is realized by adjusting the length of the circumscribed rectangle of the first and second patches in the end-fire direction and the coupling gap between the two patches; the application can be directly attached to a metal platform for use without an additional reflector and multiple directors, and has the advantages of compact structure, low profile, easy processing and adaptation to high-speed mobile carrier communication.
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