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antenna

An antenna and core wire technology, applied in the field of wireless signals, can solve the problems of difficult and small antenna applications, unsatisfactory standing wave ratio bandwidth, and antenna radial/lateral size limitations.

Active Publication Date: 2021-07-06
张毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the above methods have certain shortcomings when applied to the design of small antennas, for example, they are all severely limited by the radial / lateral dimensions of the antenna
Specifically, method 1 requires a certain distance between the vibrators, so in the case of limited space, it is not possible to arrange enough vibrators to cover all frequency bands. Although methods 2 and 4 can extend the single-frequency antenna to a dual-frequency or multi-frequency antenna , but the bandwidth of each frequency band is still not wide enough, the VSWR bandwidth is not ideal; and the distance between the parasitic oscillator and the sleeve and the main oscillator cannot be optimal
Method 3 needs to increase the vibrator to be very thick, which is difficult to apply in small antennas

Method used

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directio...

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Abstract

The present invention provides an antenna, comprising: a metal pipe; a coaxial cable arranged along the central axis of the metal pipe; and a variable impedance transmission line structure, including a dielectric body and a metal pieces. The invention has a stable and reliable antenna structure, realizes the miniaturization of the multi-frequency antenna, makes the bandwidth of the standing wave ratio of each frequency band sufficiently wide, and is easy to control the radiation direction of the antenna, and is convenient for practical application.

Description

technical field [0001] The present invention relates to the technical field of wireless signals, in particular to an antenna. Background technique [0002] As we all know, the antenna is a device that converts the guided wave on the transmission line and the electromagnetic wave in space, and is a key component in wireless equipment. [0003] When the positional relationship between wireless communication devices is uncertain (azimuth, distance, height), it is generally required that the ideal pattern of the antenna is omnidirectional in the horizontal plane and approximates a half-wave dipole in the vertical plane. [0004] With the development of wireless communication technology, more and more frequency bands are required to be supported by antennas. This is a big challenge for antenna design. It can be seen from the antenna theory that if the antenna wants to achieve higher efficiency, the effective length of the radiator should be comparable to 1 / 4 wavelength. Consid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/50H01Q19/02H01Q1/36
CPCH01Q1/36H01Q1/50H01Q5/10H01Q5/20H01Q5/50H01Q19/02
Inventor 张毅
Owner 张毅