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CN-115663457-B - Antenna, radio frequency antenna link, impedance tuning method and electronic equipment

CN115663457BCN 115663457 BCN115663457 BCN 115663457BCN-115663457-B

Abstract

The application relates to an antenna, a radio frequency antenna link, an impedance tuning method thereof and electronic equipment, wherein the antenna comprises a radiator, a feed end and a grounding end which are distributed at intervals are arranged at one end of the radiator along a first direction, and the first direction is the length direction of the radiator; and the first groove body is arranged on the radiator along the first direction and is arranged at a position close to the feed end. A first groove body is formed in a radiator of the designed antenna along a first direction, the first groove body is arranged close to a feed end and extends along the first direction, impedance of the antenna is changed, an existing load impedance circle of the antenna moves around an equal reflection coefficient circle in a rotating mode, quadrant rotation of the load impedance of the antenna is achieved until the load impedance circle of the antenna and a maximum power impedance point of a radio frequency power amplifier chip are located in the same quadrant, the fact that the impedance of the load impedance circle of the antenna and the impedance of the radio frequency power amplifier chip reach an optimal matching point is found, and maximum power output of the radio frequency antenna is achieved.

Inventors

  • YIN DA
  • MA YINGJIANG
  • LI SHAOBIN

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20221013

Claims (8)

  1. 1. An antenna, comprising: A radiator in a strip structure, one end of the radiator along a first direction being the length direction of the radiator and provided with a feeding end and a grounding end which are distributed at intervals, and The first slot body is arranged on the radiator along the first direction and is arranged at a position close to the feed end, and the side wall of the first slot body is connected end to form a ring shape and is used for controlling the phase change of the radiator; The feed end and the grounding end extend along a second direction, and the second direction is the width direction of the radiator; A second groove body is formed between the feed end and the grounding end, and the first groove body and the second groove body are separated from each other through the feed end; The dimension L1 of the first groove body along the first direction and the dimension L2 of the second groove body along the second direction are required to meet the following conditions that L1> L2.
  2. 2. The antenna of claim 1, wherein the length dimension L1 of the first slot along the first direction is in a range of L1>25mm, and/or the width dimension D1 of the first slot is in a range of D1 less than or equal to 0.8mm.
  3. 3. The antenna of claim 1, wherein the width dimension D2 of the second slot along the first direction is in a range of D2-1 mm, and/or the length dimension L2 of the second slot along the second direction is in a range of L2-4 mm, and L2< L1.
  4. 4. The antenna of claim 1, wherein the first slot has a first side and a second side extending in the first direction and disposed opposite each other, the feed end and the ground end extending from one end of the first side in the first direction, the feed end and the ground end each extending in a direction away from the second side, and the feed end being located on a side of the ground end toward the center of the radiator; the first groove body is arranged on one side of the feed end, which is away from the grounding end; The second groove body is arranged on one side of the feed end, facing the grounding end, along the second direction.
  5. 5. A radio frequency antenna link, comprising: An antenna according to any one of claims 1 to 4, and The radio frequency power amplifier chip transmits power signals through a transmission line and matches the power signals to the antenna through a matching circuit.
  6. 6. A method of tuning the impedance of a radio frequency antenna link as recited in claim 5, comprising: A first groove body is formed in a radiator of the antenna, the radiator is of a strip-shaped structure, one end of the radiator along a first direction is provided with a feed end and a grounding end which are distributed at intervals, the first direction is the length direction of the radiator, and the first groove body extends along the first direction of the radiator from a position close to the feed end; and rotating the impedance circle of the antenna around the equal reflection coefficient circle through the first groove body to perform quadrant matching so as to realize matching of the load impedance of the antenna and the maximum power impedance point of the radio frequency power amplifier chip.
  7. 7. The method of impedance tuning according to claim 6, wherein said rotating the impedance circle of the antenna around the equal reflection coefficient circle by the first slot body for quadrant matching comprises: The load impedance circle of the antenna circularly rotates along the clockwise direction, so that the load impedance circle of the antenna sequentially rotates from an initial first quadrant to a fourth quadrant, a third quadrant and a second quadrant; and the maximum power impedance point of the radio frequency power amplification chip is positioned in the second quadrant, and the load impedance circle of the antenna rotates to the second quadrant to realize the matching of the load impedance of the antenna and the maximum power impedance point of the radio frequency power amplification chip.
  8. 8. An electronic device comprising an antenna according to any of claims 1-4.

Description

Antenna, radio frequency antenna link, impedance tuning method and electronic equipment Technical Field The present application relates to the field of wireless communications technologies, and in particular, to an antenna, a radio frequency antenna link, an impedance tuning method thereof, and an electronic device. Background In the field of passive antenna design, a typical transmitter rf-antenna link consists of an rf power amplifier chip, a transmission line, a matching circuit, and an antenna. The radio frequency power amplifier chip transmits power signals through a transmission line and matches the power signals to the antenna through a matching circuit. However, the load impedance of the antenna cannot be optimally matched with the impedance of the rf power amplifier chip, which results in that the rf antenna cannot achieve the maximized power output. Disclosure of Invention The application aims to provide an antenna, a radio frequency antenna link, an impedance tuning method and electronic equipment thereof, wherein a load impedance circle of the antenna and a maximum power impedance point of a radio frequency power amplification chip are in the same quadrant, so that the load impedance circle of the antenna and the impedance of the radio frequency power amplification chip reach an optimal matching point, and the maximum power output of the radio frequency antenna is realized. In a first aspect, an embodiment of the application provides an antenna, which comprises a radiator in a strip-shaped structure, wherein one end of the radiator along a first direction is provided with a feed end and a grounding end which are distributed at intervals, the first direction is the length direction of the radiator, and a first groove body is arranged on the radiator along the first direction and is arranged at a position close to the feed end. According to one embodiment of the application, the length dimension L1 of the first groove body along the first direction is in the value range of L1>25mm, and/or the width dimension D1 of the first groove body is in the value range of D1 less than or equal to 0.8mm. According to one embodiment of the application, the feeding end and the grounding end extend along a second direction, the second direction is the width direction of the radiator, a second groove body is formed between the feeding end and the grounding end, and the first groove body and the second groove body are separated from each other through the feeding end. According to one embodiment of the application, the width D2 of the second groove body along the first direction is equal to or less than 1mm, and/or the length L2 of the second groove body along the second direction is equal to or greater than 4mm. According to one embodiment of the present application, the dimension L1 of the first groove body along the first direction and the dimension L2 of the second groove body along the second direction are required to satisfy the following condition that L1> L2. According to one embodiment of the application, the first slot body is provided with a first side and a second side which extend along the first direction and are oppositely arranged, the feed end and the grounding end are formed by extending from one end of the first side along the first direction, the feed end and the grounding end both extend towards the direction deviating from the second side, the feed end is positioned on one side of the grounding end facing the center of the radiator, the first slot body is arranged on one side of the feed end deviating from the grounding end, and the second slot body is arranged on one side of the feed end facing the grounding end along the second direction. In a second aspect, an embodiment of the present application provides a radio frequency antenna link, including an antenna as set forth in any one of the first aspects, and a radio frequency power amplifier chip, where the radio frequency power amplifier chip transmits a power signal through a transmission line and matches the power signal to the antenna through a matching circuit. In a third aspect, an embodiment of the present application provides a method for tuning an impedance of a radio frequency antenna link according to the second aspect, including: A first groove body is formed in a radiator of the antenna, the radiator is of a strip-shaped structure, one end of the radiator along a first direction is provided with a feed end and a grounding end which are distributed at intervals, the first direction is the length direction of the radiator, and the first groove body extends along the first direction of the radiator from a position close to the feed end; and rotating the impedance circle of the antenna around the equal reflection coefficient circle through the first groove body to perform quadrant matching so as to realize matching of the load impedance of the antenna and the maximum power impedance point of the radio frequency power amplifier chip.