CN-224232917-U - Microstrip antenna for ultra-wideband radar transceiving

Abstract

The utility model relates to a microstrip antenna for ultra-wideband radar transceiving, which comprises a transmitting antenna, a receiving antenna and a dielectric plate, wherein the receiving antenna and the transmitting antenna are arranged on the dielectric plate, the receiving antenna and the transmitting antenna have the same structure, are arranged on the same dielectric plate, and are separated by a wavelength. The dielectric plate comprises a dielectric plate I, a dielectric plate II and a dielectric plate III, the receiving antenna and the transmitting antenna comprise unit antennas, metal grounds and an antenna feed network, the metal grounds are arranged between the dielectric plate I and the dielectric plate II and between the dielectric plate II and the dielectric plate III, the unit antennas are arranged on the top layer of the dielectric plate I, and the antenna feed network is arranged on the bottom layer of the dielectric plate III. The microstrip antenna plane for receiving and transmitting the ultra-wideband radar has the advantages of reduced height and reduced antenna cost, and can integrate the transmitting radar antenna and the receiving radar antenna into a whole, and better integrate the transmitting radar antenna and the receiving radar antenna into a whole with a radar radio frequency chip.

Inventors

• LIU LIZHEN
• LIU SHAOJUN
• XIAO YAN
• LI JI

Assignees

• 郑州联睿电子科技有限公司

Dates

Publication Date

20260512

Application Date

20250512

Claims (10)

1. 1. The microstrip antenna for ultra-wideband radar transceiving is characterized by comprising a transmitting antenna, a receiving antenna and a dielectric plate, wherein the receiving antenna and the transmitting antenna are both arranged on the dielectric plate, the receiving antenna and the transmitting antenna are identical in structure, are arranged on the same dielectric plate and are spaced by one wavelength.
2. 2. The microstrip antenna for ultra-wideband radar transceiving of claim 1, wherein said dielectric plate comprises a dielectric plate one, a dielectric plate two and a dielectric plate three, said receiving antenna and said transmitting antenna each comprise a unit antenna, a metal ground and an antenna feed network, said metal ground is disposed between said dielectric plate one and said dielectric plate two and between said dielectric plate two and said dielectric plate three, said unit antenna is disposed on a top layer of said dielectric plate one, and said antenna feed network is disposed on a bottom layer of said dielectric plate three.
3. 3. The microstrip antenna for ultra wideband radar transceiving according to claim 2, wherein said unit antenna comprises an antenna radiating patch, a metal ground, a microstrip line, a circular slot, and a feed via, said antenna radiating patch being electrically connected to the microstrip line through the feed via through the circular slot.
4. 4. The microstrip antenna for ultra wideband radar transceiving according to claim 2, wherein said antenna feed network comprises an input, an output and an impedance transformation stub, said input being electrically connected to said output through said impedance transformation stub.
5. 5. A microstrip antenna for ultra wideband radar transceiving according to claim 3, wherein said antenna radiating patch is electrically connected to an output port of said antenna feed network through said feed via.
6. 6. A microstrip antenna for ultra wideband radar transceiving according to claim 3, wherein said antenna radiating patch is square, said antenna radiating patch has a rectangular slot formed therein, and said rectangular slot is inclined by 45 °.
7. 7. The microstrip antenna for ultra wideband radar transceiving according to claim 6, wherein said receive antenna and transmit antenna each comprise four element antennas, each said element antenna being spaced one-half wavelength apart.
8. 8. The microstrip antenna for ultra wideband radar transceiving of claim 7, wherein said antenna feed network comprises four outputs and four impedance transformation branches, said four outputs being electrically connected to said four impedance transformation branches, respectively.
9. 9. The microstrip antenna for ultra wideband radar transceiving according to claim 7, wherein said dielectric plate is an FR4 board having a thickness of 1.6mm, said antenna radiating patches each have a length and width of 8.5mm, each of said unit antennas is spaced 22.2mm apart, and said transmitting antenna is spaced 46mm apart from said receiving antenna.
10. 10. The microstrip antenna for ultra wideband radar transceiving according to claim 7, wherein a center frequency of said microstrip antenna for ultra wideband radar transceiving is 7.29GHz, an impedance bandwidth of less than-10 dB is greater than 1GHz, a maximum radiation gain of 8.5dbi, and a 3dB wave speed width of 26 °.

Description

Microstrip antenna for ultra-wideband radar transceiving Technical Field The utility model relates to the technical field of microstrip antennas, in particular to a microstrip antenna for ultra-wideband radar transceiving. Background The ultra-wideband radar is a carrier-free pulse system, has specific high-resolution imaging characteristics, and has better sensing and detecting capabilities. The ultra-wideband radar antenna is one of key components of an ultra-wideband radar system, and is mainly used for radiating electromagnetic signals and receiving target area reflection echoes, and the performance of the ultra-wideband radar antenna directly influences the performance of various performance indexes of the radar system. Most of the existing ultra-wideband radar antennas are biconical antennas, TEM horn antennas, vivaldi antennas, spiral antennas and log periodic antennas, and the antennas are large in size, cannot be integrated and are high in cost. The Chinese patent document CN 107579346A discloses a microstrip antenna with ultra-wideband and low radar cross section, which comprises a dielectric substrate, a metal floor, polarization conversion surfaces, radiation units and coaxial connectors, wherein the metal floor is printed on the lower surface of the dielectric substrate, the polarization conversion surfaces are printed on the upper surface of the dielectric substrate, a rectangular cavity is arranged in the center of the upper side of the dielectric substrate, the radiation units fixed with the output ends of the coaxial connectors are arranged above the cavity, the polarization conversion surfaces consist of four polarization conversion unit groups, each polarization conversion unit group comprises a plurality of descending fractal units, and the arrangement directions of the descending fractal units in adjacent polarization conversion unit groups differ by 900. In an antenna system with complex electromagnetic environment, electromagnetic interference between antennas is reduced in a wide frequency band. The technical scheme solves the technical problem that the cross section of the existing microstrip antenna is narrow in width, but the technical scheme is not large in size, unable to integrate and high in antenna cost. Disclosure of utility model The utility model provides a microstrip antenna for receiving and transmitting ultra-wideband radar, which has the characteristics of small volume, low section, low cost and easy integration, integrates a transmitting antenna and a receiving antenna on a dielectric plate, and is more convenient for integrating a receiving antenna and a radar radio frequency chip into a whole while meeting the requirements of high-gain narrow lobes, so that the radar is more convenient in testing and is beneficial to product integration. In order to solve the technical problems, the technical scheme adopted by the utility model is that the microstrip antenna for receiving and transmitting ultra-wideband radar comprises a transmitting antenna, a receiving antenna and a dielectric plate, wherein the receiving antenna and the transmitting antenna are both arranged on the dielectric plate, the receiving antenna and the transmitting antenna have the same structure, are arranged on the same dielectric plate and are separated by a wavelength. By adopting the technical scheme, the transmitting antenna and the receiving antenna with the same structure are adopted, the transmitting antenna and the receiving antenna are integrated on the dielectric plate, the high-gain narrow lobe is met, meanwhile, the receiving and transmitting antenna and the radar radio frequency chip are more convenient to integrate, the radar test is more convenient, and the product integration is facilitated. Preferably, the dielectric plate comprises a dielectric plate I, a dielectric plate II and a dielectric plate III, the receiving antenna and the transmitting antenna comprise unit antennas, metal grounds and an antenna feed network, the metal grounds are arranged between the dielectric plate I and the dielectric plate II and between the dielectric plate II and the dielectric plate III, the unit antennas are arranged on the top layer of the dielectric plate I, and the antenna feed network is arranged on the bottom layer of the dielectric plate III. The three-layer dielectric plates are adopted to form four layers of metal surfaces, the antenna radiating unit is positioned on the top layer, the metal is positioned on the middle layer, the feed network is positioned on the bottom layer, the antenna metal ground and the feed network metal ground share one, the structure layout effectively integrates the feed network and the antenna structure on one laminated plate, the external connection of the feed network and an antenna result is avoided, and the integrated design structure is very convenient to use and low in manufacturing cost. Preferably, the unit antenna comprises an antenna radiation piece, a m