Broadband plane antenna

Abstract

The invention relates to a broadband plane antenna which comprises a substrate, a first radiator, a second radiator, a third radiator, a grounding part and a signal source, wherein the substrate is provided with a first surface and a second surface; the first radiator is arranged on the first surface; the second radiator is connected with the first radiator at the connecting part; the third radiator is arranged on the first surface or the second surface; the grounding part is connected with the third radiator; the signal source feeds in positive signals and negative signals; the positive signals are directly fed in through the connecting part so as to excite the first radiator and the second radiator to form a first frequency band mode and a second frequency band mode, and negative signals are in coupling with the grounding part, thereby being in coupling feeding in and exciting the third radiator to form a third frequency band mode. By making use of the design of the first radiator, the second radiator and the third radiator, the antenna can be applied to most advanced communication equipment with worldwide interoperability for microwave storing and fetching at preset. In addition, the broadband plane antenna has the effect of power saving compared with an ordinary broadband antenna, therefore, the antenna is particularly suitable for portable communication equipment.

Description

technical field [0001] The invention relates to a broadband antenna; in particular, the invention relates to a broadband planar antenna used for signal transmission in a wireless communication network. Background technique [0002] With the widespread use of the physical Internet, human beings have gradually shifted their attention to wireless, long-distance, and broadband methods to replace physical broadband wiring and accelerate the penetration rate of broadband users. Therefore, the industry continues to introduce more advanced wireless communication network technologies and standards. For example, the Institute of Electrical and Electronics Engineers (IEEE) defined the WiFi wireless network standard in 802.11 and the Worldwide Interoperability for Microwave Access (WiMAX) standard defined in 802.16 recently. Especially in the case of WiMAX, its transmission distance can be increased from meters to tens of kilometers, and it has the characteristics of wireless broadband...

AI Technical Summary

Problems solved by technology

[0004] Since the antenna uses direct feed-in to feed the signal, the bandwidth of the low-frequency mode is about 200MHz, which fails to meet the broadband requirements of WIMAX

In addition, in order to match the operating frequency of the low-frequency mode, the length of the second radiator 32 cannot be reduced, so it will not be able to meet the miniaturization demands of various electronic devices.

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