UWB (ultra wide band) slot antenna with filtering function

Abstract

The invention discloses a UWB (ultra wide band) slot antenna with a filtering function, and the slot antenna comprises a dielectric plate. The top surface of the dielectric plate is provided with a stepped feed microstrip line along a central axis, and an antenna backboard is provided with an opened slot, wherein the position of the opened slot is coupled with the stepped feed microstrip line. A part, close to the opened slot, in the antenna backboard is provided with a narrowband slot. The slot antenna greatly improves the frequency selection characteristics of a sideband under the conditionthat the size of the slot antenna is not increased, improves the inhibition of an OOB (out of band) interference signal, and is used in the UWB fields of target detection, target tracking and short-distance wireless communication.

Description

technical field

[0001] The invention belongs to the technical field of ultra-wideband antennas, and relates to an ultra-wideband slot antenna with filtering function. Background technique

[0002] With the development of wireless communication technology, ultra-wideband communication technology has been well developed in recent years. As an important part of ultra-wideband communication, ultra-wideband antenna has received extensive research.

[0003] In actual engineering applications, due to the wide bandwidth of UWB, it is easy to be affected by some interference signals outside the band. Introducing interference signals into the received signal will seriously affect the receiving performance of the receiver. In traditional engineering applications, a band-pass filter is usually connected in series behind the receiving antenna to suppress the interference of out-of-band signals. However, having the antenna and filtering as two separate components in this approach increa...

Examples

Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] refer to figure 1 , the structure of the microstrip ultra-broadband antenna with notch function of the present invention is that the dielectric plate is selected from Rogers plates or other plates using microwave frequency bands, such as Rogers, ceramics, etc. Considering that the operating frequency of the antenna is relatively high, the Rogers plate is high The frequency stability is better, and the RT / Duroid5880 dielectric plate of Rogers is preferred. The dielectric constant of the dielectric plate is 2.2 and the thickness is 0.787mm; Electric microstrip line 1 adopts high and low impedance feeding microstrip line structure, so that it has better frequency selection characteristics at high frequencies;

[0021] The antenna backplane 2 is provided with an open slot 3, and the position of the open slot 3 is coupled with the step fee...

technical field

[0001] The invention belongs to the technical field of ultra-wideband antennas, and relates to an ultra-wideband slot antenna with filtering function. Background technique

[0002] With the development of wireless communication technology, ultra-wideband communication technology has been well developed in recent years. As an important part of ultra-wideband communication, ultra-wideband antenna has received extensive research.

[0003] In actual engineering applications, due to the wide bandwidth of UWB, it is easy to be affected by some interference signals outside the band. Introducing interference signals into the received signal will seriously affect the receiving performance of the receiver. In traditional engineering applications, a band-pass filter is usually connected in series behind the receiving antenna to suppress the interference of out-of-band signals. However, having the antenna and filtering as two separate components in this approach increa...

Examples

Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] refer to figure 1 , the structure of the microstrip ultra-broadband antenna with notch function of the present invention is that the dielectric plate is selected from Rogers plates or other plates using microwave frequency bands, such as Rogers, ceramics, etc. Considering that the operating frequency of the antenna is relatively high, the Rogers plate is high The frequency stability is better, and the RT / Duroid5880 dielectric plate of Rogers is preferred. The dielectric constant of the dielectric plate is 2.2 and the thickness is 0.787mm; Electric microstrip line 1 adopts high and low impedance feeding microstrip line structure, so that it has better frequency selection characteristics at high frequencies;

[0021] The antenna backplane 2 is provided with an open slot 3, and the position of the open slot 3 is coupled with the step fee...

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