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KR-102962393-B1 - Anti-interference structure of millimeter-wave antennas

KR102962393B1KR 102962393 B1KR102962393 B1KR 102962393B1KR-102962393-B1

Abstract

The present invention discloses an interference prevention structure for a millimeter-wave antenna, comprising a transmitting array antenna and/or a receiving array antenna composed of at least one comb-shaped antenna assembly; wherein the comb-shaped antenna assembly comprises a strip-shaped antenna body and a microstrip radiation assembly, wherein one end of the antenna body is connected to a millimeter-wave circuit capable of generating millimeter waves, and the microstrip radiation assembly comprises a plurality of intermediate microstrip radiation units spaced apart at the intermediate end of the antenna body and a terminal microstrip radiation unit installed at the end of the antenna body, and each intermediate microstrip radiation unit and the terminal microstrip radiation unit are spaced apart at the antenna body in the same inclined direction to reduce the interference phenomenon of noise from opposite directions.

Inventors

  • 주 웨이
  • 량 챠오타오
  • 촹 하오린
  • 린 친후이
  • 양 팅팅

Assignees

  • 지앙수 캉루이 뉴 머티리얼 테크놀로지 컴퍼니 리미티드

Dates

Publication Date
20260507
Application Date
20201210

Claims (20)

  1. At least one comb-shaped antenna assembly (12, 120, 1200) comprising a long strip-shaped antenna body (11) and a microstrip antenna radiation assembly (121, 122, 123, 124) installed on the antenna body (11), wherein one end of the antenna body (11) is connected to a millimeter wave circuit (C1) capable of generating millimeter waves; The microstrip antenna radiation assembly (121, 122, 123, 124) comprises a plurality of intermediate microstrip antenna radiation units (121, 122, 123) spaced apart and installed at the intermediate end of the antenna body (11), and a terminal microstrip antenna radiation unit (124) installed at one end of the antenna body (11) away from the millimeter wave circuit (C1), wherein each intermediate microstrip antenna radiation unit (121, 122, 123) and the terminal microstrip antenna radiation unit (124) are all spaced apart and installed on the antenna body (11) in an inclined direction. The area of the intermediate microstrip antenna radiation unit (121, 122, 123) at one end of the antenna body (11) away from the millimeter wave circuit (C1) is not smaller than the area of the intermediate microstrip antenna radiation unit (121, 122, 123) at one end adjacent to the millimeter wave circuit (C1), and To improve the overall gain of the comb-shaped antenna assembly by making the radiation energy efficiency of each intermediate microstrip radiation unit approach a distributed average state, the area size ratio of two adjacent intermediate microstrip antenna radiation units (121, 122, 123) having increasing areas is 1.1 to 1.2:1, and In order for the resonance point of the above intermediate microstrip antenna radiation unit to be maintained at a frequency adjacent to 76.5 GHz, each intermediate microstrip antenna radiation unit (121, 122, 123) is a rectangular shape with a length-to-width ratio of 1.2 to 1.3:1, Anti-interference structure for millimeter wave antennas.
  2. In paragraph 1, An interference prevention structure for a millimeter wave antenna, wherein the inclined angle between the intermediate microstrip antenna radiation unit (121, 122, 123) and the antenna body (11), and between the terminal microstrip antenna radiation unit (124) and the antenna body (11) is the same.
  3. In paragraph 2, An interference prevention structure for a millimeter wave antenna, wherein the inclined angle between the intermediate microstrip antenna radiation unit (121, 122, 123) and the antenna body (11) and the inclined angle between the terminal microstrip antenna radiation unit (124) and the antenna body (11) are 45 degrees.
  4. In paragraph 1, An interference prevention structure for a millimeter wave antenna, wherein the inclined angle between the intermediate microstrip antenna radiation unit (121, 122, 123) and the antenna body (11) and the inclined angle between the terminal microstrip antenna radiation unit (124) and the antenna body (11) are different.
  5. In any one of paragraphs 1 through 4, An interference prevention structure for a millimeter wave antenna, wherein one corner of each intermediate microstrip antenna radiation unit (121, 122, 123) is respectively connected to the antenna body (11), and a bent portion is installed at one end of the antenna body (11) adjacent to the terminal microstrip antenna radiation unit (124).
  6. In paragraph 1, The arrangement of the intermediate microstrip antenna radiation units (121, 122, 123) is such that the area of the intermediate microstrip antenna radiation units (121, 122, 123) relatively adjacent to the millimeter wave circuit (C1) is smaller than the area of the intermediate microstrip antenna radiation units (121, 122, 123) separated from the millimeter wave circuit (C1), thereby forming an interference prevention structure for a millimeter wave antenna.
  7. In paragraph 1, The locally adjacent intermediate microstrip antenna radiation units (121, 122, 123) have the same area, forming an interference prevention structure for a millimeter-wave antenna.
  8. In paragraph 1, An interference prevention structure for a millimeter wave antenna, wherein the shape of each of the intermediate microstrip antenna radiation unit (121, 122, 123) and the terminal microstrip antenna radiation unit (124) is rectangular, polygonal, or elliptical.
  9. In paragraph 6, An interference prevention structure for a millimeter wave antenna, wherein the shape of each of the intermediate microstrip antenna radiation unit (121, 122, 123) and the terminal microstrip antenna radiation unit (124) is rectangular, polygonal, or elliptical.
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  12. In paragraph 8, The above-mentioned end microstrip antenna radiation unit (124) has a square shape, and a rectangular notch is provided at the portion connecting the end microstrip antenna radiation unit (124) to the antenna body (11), and the end of the antenna body (11) penetrates the center of the notch and is then connected to a portion adjacent to the center of the end microstrip antenna radiation unit (124), an interference prevention structure for a millimeter wave antenna.
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Description

Anti-interference structure of millimeter-wave antennas The present invention relates to an interference prevention structure for a millimeter-wave antenna, and more particularly to an antenna structure that effectively reduces interference from noise in opposite directions and improves gain. As consumers increasingly prioritize the safety of automobile use and the development of related science and technology gradually matures, detection devices that assist in preventing collision accidents during driving by detecting various dynamic situations around the vehicle (e.g., information such as the relative position, relative speed, and angle of vehicles, pedestrians, or other obstacles) are also being applied more widely; the technical means currently applied to common collision avoidance detection devices can be roughly divided into the following categories. Ultrasound: As a mechanism for measuring the distance of an object using ultrasound, ultrasonic pulse waves are transmitted and received by a transducer using an ultrasonic sensor. Although such ultrasonic sensors maintain a certain level of accuracy by performing corrections based on changes in parameters such as temperature and voltage when operating or before reading each measurement range; however, when used, objects that are too small cannot effectively reflect ultrasound, so if the object is too small, it cannot reflect enough ultrasound to satisfy the detection requirements of the ultrasonic sensor, thereby limiting its application. Infrared: Utilizing the principle of distance measurement based on light reflection, it emits light through a single infrared LED, receives the infrared signal via another infrared receiving assembly, measures the intensity, and determines the distance based on the magnitude of the intensity; however, the infrared distance measurement angle is small and lacks completeness. Furthermore, since the basic principle of detection relies on light reflection, using it on surfaces with low reflection efficiency (e.g., dark-colored surfaces) significantly affects the detection results and leads to limitations in applications. Laser: A laser beam is transmitted using a transmitter and time (T1) is recorded, and the time (T2) is when the laser beam is irradiated onto an object, reflected back, and the sensor receives the returned light. If we assume that the speed at which the laser beam propagates in the air is V, the distance between the sensor and the object can be calculated as S = V * (T2 - T1) / 2; however, when using a laser device, if foreign substances such as water or dust adhere to the surface of the transmitter, they reflect the laser light and generate a false signal, and the accuracy of laser distance measurement is low, which becomes a disadvantage in use. Millimeter wave: Electromagnetic waves with a wavelength in the range of 1 mm to 10 mm (frequency in the range of 30 GHz to 300 GHz) can be used to calculate the distance by measuring the time difference between transmission and reception; if applied to long-range detection for vehicles, using the 7 GHz millimeter wave frequency band is relatively suitable, and the millimeter wave frequency band currently applied to automotive surrounding radar is approximately 24 GHz, and since the wavelength of the millimeter wave is the longest, it is less affected by environmental weather and is most suitable for application to long-range detection. In an antenna structure for transmitting or receiving millimeter waves, which is traditionally applied to millimeter wave devices, as shown in FIG. 1, the structure of the millimeter wave antenna (B) can be primarily etched directly onto a circuit board (C) and includes two parts such as a transmitting array antenna (B1) and a receiving array antenna (B2), each composed of a plurality of comb-shaped antenna assemblies (2); in the embodiment shown in FIG. 1, the transmitting array antenna (B1) is composed of three comb-shaped antenna assemblies (2), and the receiving array antenna (B2) is composed of four comb-shaped antenna assemblies (2) (the comb-shaped antenna assemblies (2) located on both sides of the receiving array antenna (B2) perform isolation and do not introduce millimeter waves), and in actual application, the number of these comb-shaped antenna assemblies (2) can be adjusted according to the millimeter wave transmission strength and reception sensitivity to satisfy different demands. The above traditional comb-shaped antenna assembly (2) structure is primarily formed by connecting a plurality of microstrip radiation units (22) in series, each microstrip radiation unit (22) having a fixed size and a rectangular (or square) structure, and is arranged in the forward direction at equal intervals on a strip-shaped antenna body (21) to form a comb-shaped antenna assembly (2) configured as a serial feeding structure; When a comb-shaped antenna assembly (2) of this serial feeding structure is applied to a transmitting array ant