CN210430084U

CN210430084U - Three-trapped wave ultra-wideband antenna

Info

Publication number: CN210430084U
Application number: CN201921277334.8U
Authority: CN
Inventors: 贺卫; 黄新利; 冯汉炯; 闫泽涛
Original assignee: SHENZHEN AEROSPACE INNOTECH CO Ltd
Current assignee: SHENZHEN AEROSPACE INNOTECH CO Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-04-28
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses a three trapped wave ultra wide band antennas, a serial communication port, include: the upper surface of the dielectric substrate is covered with a radiation patch, and the lower surface of the dielectric substrate is covered with a grounding plate; the radiation patch comprises a crescent patch front end, and a complementary split resonant ring groove is arranged on the crescent patch front end; the microstrip feeder line is connected to the tail part of the front end of the crescent patch, and two sides of the microstrip feeder line are respectively provided with an electromagnetic band gap structure; a ground plate comprising an arcuate edge floor. The utility model discloses a crescent radiation paster front end, the structural design of gradual change formula microstrip feed line and defect ground has realized the performance of ultra wide band. The utility model discloses still through the technological means who adopts complementary split resonance annular groove and electromagnetism band gap simultaneously, realize the ultra wide band performance that has three frequency stop band.

Description

Three-trapped wave ultra-wideband antenna

Technical Field

The utility model relates to an ultra wide band antenna technical field especially relates to a three trapped wave ultra wide band antennas.

Background

Ultra-wideband (UWB) technology is a new wireless communication technology that is currently attracting much attention. UWB systems are widely used, for example, in vehicle radar systems, indoor ultra wideband systems, and the like, due to their characteristics of fast transmission speed, low power consumption, simple system, and high interference rejection.

Most antennas applied to UWB positioning terminals in the market currently have a wide frequency coverage, and some frequency bands share frequency band resources with other systems, and may interfere with other systems, such as WIMAX systems (3.3-3.8GHz), WLAN systems (5.15-5.825GHz), and X-band satellite communication frequency bands (7.9-8.4 GHz). Therefore, the UWB antenna with the band trap function is designed and developed for the UWB positioning terminal, and the UWB positioning terminal has high practical value.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a three trapped wave ultra wide band antennas, it is little to realize the whole size of equivalent performance, possesses 3 frequency stop bands simultaneously, can avoid with WIMAX system, WLAN system and X wave band satellite communication system's mutual interference, can integrate in the UWB positioning terminal.

The utility model adopts the technical proposal that:

in a first aspect, the utility model provides a three trapped wave ultra wide band antennas, include:

the upper surface of the dielectric substrate is covered with a radiation patch, and the lower surface of the dielectric substrate is covered with a grounding plate; the radiation patch comprises a crescent patch front end, and a complementary split resonant ring groove is arranged on the crescent patch front end; the microstrip feeder line is connected to the tail part of the front end of the crescent patch, and two sides of the microstrip feeder line are respectively provided with an electromagnetic band gap structure; a ground plate comprising an arcuate edge floor.

Further, the electromagnetic band gap structure is a rectangular patch provided with a groove.

Furthermore, the grooves are arranged on the rectangular patch and are symmetrically arranged with the center of the rectangular patch.

Further, the shape of the groove is L-shaped.

Further, the rectangular patch and the trench define an electromagnetic bandgap range.

Furthermore, the top center of the arc-shaped edge floor is provided with an arc-shaped notch to form a defect ground.

Furthermore, crescent paster front end is for cutting off the paster structure that the ellipse part was left from ellipse paster front end top, just be provided with in the crescent paster front end complementary split resonance ring channel.

Furthermore, the microstrip feeder line is trapezoidal.

Furthermore, the working bandwidth of the triple-notch ultra-wideband antenna is 2GHz-10 Hz.

The utility model has the advantages that:

the utility model discloses a crescent radiation paster front end, the structural design of gradual change formula microstrip feed line and defect ground has realized the performance of ultra wide band. The utility model discloses still through the technological means who adopts complementary split resonance annular groove and electromagnetism band gap simultaneously, realize the ultra wide band performance that has three frequency stop band.

Drawings

Fig. 1 is a schematic diagram of an upper patch structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a lower defective ground according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a cross-sectional structure of an embodiment of the present invention;

fig. 4 is a schematic diagram of the impedance ratio simulation and actual measurement results of the antenna structure design embodiment of the present invention.

Description of reference numerals

10: a dielectric substrate;

20: a patch front end;

21: a complementary split resonant ring-shaped slot;

30: a microstrip feed line;

40: a ground plate;

50: an EBG structure;

51: first EBG structure

52: second EBG Structure

60: probe needle

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1, 2 and 3, there is shown a triple-notch ultra-wideband antenna, the structure comprising: the dielectric substrate 10, the patch front end 20, the microstrip feeder 30, the ground plate 40 and the rectangular patch 50 are arranged on the upper surface of the dielectric substrate 10, and the ground plate 40 is arranged on the lower surface of the dielectric substrate 10.

The utility model discloses the patch antenna printing has upper surface radiation paster and lower surface conducting layer to cover respectively on FR4 medium base plate 10 on medium base plate 10's upper and lower two surfaces, and the material is copper. The radiation patch is connected with the conductive layer through the SMA connector; the upper surface radiation patch is a similar-high-pin cup-shaped patch, the radiation patch comprises a patch front end 20 with the caliber gradually reduced from large and a trapezoidal microstrip feeder line 30 with the gradually changed width connected to the tail part of the patch front end 20, the input impedance of the microstrip feeder line is 50 omega, and the patch front end 20 is a bilateral-symmetric gradually-changed structure left by cutting an arc-shaped surface from the oval patch front end.

The patch front end 20 is crescent-shaped, and a complementary split resonant annular groove 21 is arranged in the patch front end 20. The complementary split resonant annular groove 21 is an annular groove with a rectangular notch at the lower end. The trap effect can be well adjusted by the annular structure. The arrangement of the complementary split resonant ring slots 21 creates WIMAX system (3.3-3.8GHz) band notch.

Preferably, the shape of the resonant annular groove can be a circular ring type or a square ring type.

A pair of EBG (electromagnetic band gap) structures 50 is disposed on both sides of the microstrip feed line 30, the rectangular patch structure is a common mushroom-type structure, a pair of L-shaped grooves is disposed inside the rectangular patch, and the patch structure constitutes an Electromagnetic Band Gap (EBG) structure. The two electromagnetic band gap structures have similar structures and different sizes. Good notch characteristics are achieved by adjusting parameters such as the mutual position and orientation of the L-shaped grooves, the width and length of the L-shaped grooves, and the distance between the L-shaped grooves and the feed port. A first EBG structure 51 is provided on one side of the microstrip feed line to create a wireless local area network (5.15-5.825GHz) band notch. And a second EBG structure 52 is arranged on the other side of the microstrip feeder line to generate an X-band satellite communication frequency band (7.9-8.4GHz) notch. The EBG structure is grounded through the probe 60. Compared with the prior art, the EBG structure adopts the design of the pair of L-shaped grooves which are symmetrical by the centers of the patches, which is favorable for improving the accuracy of the trapped wave, not only can better achieve the trapped wave effect, but also is favorable for miniaturizing the antenna main body.

The back of the dielectric substrate 10 is provided with a ground plate 40, the ground plate 40 is an arc edge floor, and a dug arc surface, called a defect ground, is arranged at the top center of the ground plate.

The caliber of the front end 20 of the patch of the surface radiation patch on the dielectric substrate 10 is gradually reduced from large to small, the front end and the tail end are combined with the microstrip feeder 30 connected to the tail part to form a high-pin-like cup structure, and the resonance modes of the antenna in different frequency bands can be stably transited by the gradual change of the structure in cooperation with the concave arc edge floor, so that good impedance matching in a wider frequency band is ensured.

The radiating patch 10 of the antenna and the ground plate 40 of the antenna are fed by a graded microstrip feed line, thereby obtaining a stop band bandwidth of ultra-wideband.

In this embodiment, the complementary split resonant ring slot 22 is capable of producing a 3.3-3.8GHz band notch. The two electromagnetic band gap structures respectively form two frequency band notches which are respectively 4.82 GHz-5.88 GHz and 7.7 GHz-8.55 GHz.

Referring to fig. 4, which shows a diagram of simulation and actual measurement results of the standing wave ratio (VSWR) of the antenna structure in the HFSS software test environment,

from the simulation diagram, it can be known that: when the standing-wave ratio is less than 2, the effective radiation power of the antenna is high, the antenna can work normally, and when the standing-wave ratio is more than 2, the radiation power loss of the antenna is large.

Simulation results show that: the normal working frequency band of the antenna design embodiment is 2.5GHz-10GHz, can simultaneously filter electromagnetic interference generated by three narrow-band communication systems of a WIMAX system (3.3-3.8GHz), a WLAN system (5.15-5.825GHz) and an X-band satellite communication frequency band (7.9-8.4GHz), and has basically stable radiation characteristic in a pass-band frequency band, so that the antenna has higher practical value.

The ultra-wideband antenna with the three-notch characteristic shown in the embodiment has the advantages of miniaturization, simple structure, more notch quantity, good notch form and the like, and the technical means of a complementary split resonant annular groove, an electromagnetic band gap structure and a defect ground are adopted to generate the stop band, so that the interference of three narrow-band signals of WIMAX, WLAN and X-band satellites is filtered, and the mutual compatible cooperative communication between the ultra-wideband system and other narrow-band communication systems is realized. The cambered surface is arranged at the center of the top of the grounding plate to form the shape matching of the defected ground structure and the radiation patch, the antenna can be stably transited in the conversion of different resonance modes through the gradual change of the structure, and the good impedance matching can be obtained in a wider frequency band, so that the performance of the antenna can be optimized. In addition, the embodiment adopts the technical means of the complementary split resonant annular groove and the central symmetrical L-shaped groove to generate the trapped wave characteristic, has simple structure, replaces the design of a filter, reduces the design cost and the design complexity, is convenient to process, is convenient to produce, and has smaller size and compact structure.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. A triple-notch ultra-wideband antenna, comprising:

the upper surface of the dielectric substrate is covered with a radiation patch, and the lower surface of the dielectric substrate is covered with a grounding plate;

the radiation patch comprises a crescent patch front end, and a complementary split resonant annular groove is formed in the patch front end;

the microstrip feeder line is connected to the tail part of the front end of the crescent patch, and two sides of the microstrip feeder line are respectively provided with an electromagnetic band gap structure;

a ground plate comprising an arcuate edge floor.

2. The tri-notch ultra wideband antenna of claim 1, wherein the electromagnetic bandgap structure is a rectangular patch provided with a trench.

3. The tri-notch ultra wideband antenna of claim 2, wherein the slots are disposed on the rectangular patch and are symmetrically disposed about a center of the rectangular patch.

4. The tri-notch ultra-wideband antenna of claim 3, wherein the slot is L-shaped.

5. The tri-notch ultra-wideband antenna of claim 4, wherein the rectangular patch and the trench determine an electromagnetic bandgap range of the electromagnetic bandgap structure.

6. The tri-notch ultra wide band antenna as claimed in claim 1 or 2, wherein a cambered notch is arranged at the top center of the cambered edge floor to form a defected ground.

7. The triple-notch ultra-wideband antenna according to claim 1 or 2, wherein the crescent patch front end is a patch structure obtained by cutting off an elliptical portion from the top of an elliptical patch front end, and the complementary split resonant annular groove is formed in the patch front end.

8. The triple-notch ultra-wideband antenna according to claim 1 or 2, wherein the complementary split resonant annular groove is a circular groove or a square ring groove with a notch at the lower end.

9. The tri-notch ultra-wideband antenna of claim 1 or 2, wherein the microstrip feed line is trapezoidal in shape.

10. The tri-notch ultra-wideband antenna of claim 1 or 2, characterized in that its operating bandwidth is 2GHz-10 Hz.