Wideband planar antenna

Abstract

The invention relates to the technical field of antenna design, in particular to a wideband planar antenna. The wideband planar antenna comprises a dielectric base plate, a metal grounding plate, a micro-strip feeder, a coaxial connector and N radiating units, wherein the N is greater than or equal to 5; the N radiating units and the micro-strip feeder are printed on the upper surface of the dielectric base plate, the first radiating unit to the Nth radiating unit are sequentially arranged at both sides of the micro-strip feeder in a mutually-staggered way according to a log-periodic mode, the sizes of the N radiating units are increased according to certain scaling factors, and a first gap is arranged between each radiating unit and the micro-strip feeder; the metal grounding plate is printed on the lower surface of the dielectric base plate; an outer conductor of the coaxial connector is connected with the metal grounding plate, and an inner conductor of the coaxial connector is connected with the micro-strip feeder. The wideband planar antenna provided by the invention has a simple and effective structure, and a wideband antenna with the relative bandwidth of more than 66.7 percent is realized.

Description

technical field [0001] The invention relates to the technical field of antenna design, in particular to a broadband planar antenna. Background technique [0002] In recent years, wireless communication technology has developed rapidly, and the demand for broadband communication equipment is increasing, especially in the fields of ultra-wideband communication and direction finding. This undoubtedly increases the demand for broadband antennas, so the design of broadband antennas has become a research hotspot in the field of antennas. [0003] In terms of the design of the zero-order resonant antenna, since the zero-order resonant antenna has an infinite wavelength, and its resonant frequency has nothing to do with the physical length, this characteristic makes the size of the zero-order resonant antenna greatly reduced compared with the traditional half-wavelength antenna , it is very easy to realize the miniaturization design of the antenna, but the disadvantage of the zero-...

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Problems solved by technology

[0003] In terms of the design of the zero-order resonant antenna, since the zero-order resonant antenna has an infinite wavelength, and its resonant frequency has nothing to do with the physical length, this characteristic makes the size of the zero-order resonant antenna greatly reduced compared with the traditional half-wavelength antenna , it is very easy to realize the miniaturization design of the antenna, but the disadvantage of the zero-order resonant antenna is that the working bandwidth is very narrow

At present, many methods have been proposed to solve the bandwidth problem of the zero-order resonant antenna, but it is still difficult to realize a broadband antenna with a relative bandwidth of 66.7% or more

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