CN205863401U

CN205863401U - A kind of broadband trap antenna

Info

Publication number: CN205863401U
Application number: CN201620423395.0U
Authority: CN
Inventors: 林伟立; 程勇; 吕文俊
Original assignee: Amphenol Changzhou Advanced Connector Co Ltd
Current assignee: Amphenol Changzhou Advanced Connector Co Ltd
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2017-01-04
Anticipated expiration: 2026-05-11

Abstract

This utility model relates to a kind of broadband trap antenna, and this antenna includes earth plate, dielectric substrate, radiation patch and parasitic structure.Radiation patch covers in the upside of medium substrate, feeds antenna with microstrip feed structures, and what " U " type radiation patch both sides were symmetrical posts down " h " type parasitic structure.The downside metal clad earth plate of medium substrate, earth plate has a polygonal groove.Design its bandwidth of example, between 2.75 12.5GHz, achieves the trap characteristic in 4.9 6.5GHz frequency bands by parasitic structure, effectively shields the impact on 5GHz frequency range WLAN communication.This example meets the requirement of ultra broadband, it is achieved that the trap characteristic of one-segment, has certain practicality.

Description

A kind of broadband trap antenna

Technical field

This utility model relates to a kind of antenna, a kind of broadband trap antenna.

Background technology

In recent years, along with the continuous progress of science and technology, also there is change with rapid changepl. never-ending changes and improvements, respectively in wireless communication field Planting radio communication service to develop rapidly, this also makes the most exhausted radio spectrum resources become more nervous.People To the contradiction day between the demand in terms of wireless communication system speed, capacity and safety and crowded radio spectrum resources increasingly Play, opens up wide band scope and becomes the most urgent.The various advantages that UWB technology possesses because of himself can solve smoothly with characteristic Certainly this problem, and ultra-wideband antenna is as assembly important in wireless communication system, its research just becomes the most meaningful. Due to the whether fine or not performance directly affecting whole ultra-wideband communication system of the performance of antenna and communication quality, so designing height The ultra-wideband antenna of quality becomes the most meaningful.In addition, in order to avoid the interference to other communication system frequency range, design The ultra-wideband antenna that can produce special frequency channel trap becomes the most necessary.

Utility model content

This utility model mainly provides a kind of broadband trap antenna, it is achieved that the requirement of ultra broadband and special frequency channel Trap.

Realize the technical solution of the utility model: a kind of broadband trap antenna, including medium substrate, radiation patch, parasitism Structure, feed microstrip line structure and earth plate.Radiation patch, parasitic structure and feed microstrip line structure cover at medium substrate Upside, wherein symmetrical the posting in radiation patch (or claiming the radiation patch of approximation " recessed " type) both sides of approximation " U " type approximates " h " The parasitic structure of type.The downside metal clad earth plate of medium substrate, earth plate has the groove of an irregular polygon.

The upper and lower sides of medium substrate uses circuit board lithographic technique, etching radiation patch, parasitic structure, feed microstrip line knot Structure and earth plate；Feed microstrip line structure is as the electric wave signal feed-in source of antenna.

One antenna of this example design, its bandwidth achieves the characteristic of ultra broadband between 2.75-12.5GHz, and Between 4.9-6.5GHz, create trap, effectively shield the interference of the WLAN communication system to this frequency range.

Accompanying drawing explanation

Fig. 1 is the three dimensional structure schematic diagram of this utility model broadband trap antenna.

Fig. 2 is the structural representation on the upside of the medium substrate of this utility model broadband trap antenna.

Fig. 3 is the structural representation of the earth plate on the downside of the medium substrate of this utility model broadband trap antenna.

Fig. 4 is antenna reflection coefficient characteristic curve.

Fig. 5, Fig. 6 are the antenna patterns of antenna.

Wherein, accompanying drawing 5 (a) gives the antenna antenna pattern at 2.9GHz；Accompanying drawing 5 (b) gives antenna and exists The antenna pattern of 4.4GHz；

Accompanying drawing 6 (a) gives the antenna antenna pattern at 7.5GHz；Accompanying drawing 6 (b) gives the antenna spoke at 8.5GHz Penetrate directional diagram；Accompanying drawing 6 (c) gives the antenna antenna pattern at 9.5GHz；Accompanying drawing 6 (d) gives antenna 10.5GHz's Antenna pattern；Accompanying drawing 6 (e) gives the antenna antenna pattern at 11.5GHz；

Fig. 7 is antenna gain curve.

Wherein:

1-radiation patch；2-parasitic structure；3-feed microstrip line structure；4-earth plate；5-ground connection board slot；6-medium base Plate.

Detailed description of the invention

Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, wherein The most same or similar label represents same or similar element or has the element of same or like function.Lead to below It is exemplary for crossing the embodiment being described with reference to the drawings, and is only used for explaining this utility model, and can not be construed to this practicality Novel restriction.

It is understood that unless otherwise defined, all terms used herein (include skill to those skilled in the art of the present technique Art term and scientific terminology) have with the those of ordinary skill in this utility model art be commonly understood by identical meaning Justice.Should also be understood that those terms defined in such as general dictionary should be understood that have with prior art upper The meaning that meaning hereinafter is consistent, and unless defined as here, will not come by idealization or the most formal implication Explain.

As shown in Figure 1, Figure 2, Figure 3 shows, structure of the present utility model is: antenna is produced on medium substrate 6, wherein radiates list Unit and feed microstrip line structure 3 are positioned at the upside of medium substrate 6, and earth plate 4 is positioned at the downside of medium substrate 6.Radiating element by Radiation patch 1 and parasitic structure 2 form, and parasitic structure 2 is for producing the trap of special frequency channel；Feed microstrip line structure 3 is by two One trapezoidal composition of individual rectangle；Earth plate 4 is the groove opening an irregular polygon on rectangle earth plate.

Preferably, the shape of radiation patch 1 approximation " U " type, parasitic structure 2 symmetry be distributed in radiation patch Both sides, shape approximation fall " h " type, feed microstrip line structure 3 is formed by two rectangles and one are trapezoidal, trapezoidal be positioned at two long Square centre, on it, the end, is connected with two rectangular broadsides respectively with going to the bottom, rectangular with what the trapezoidal upper end was connected Another broadside is connected with radiation patch 1.

Preferably, the downside of medium substrate is coated with earth plate 4, wherein has one on the earth plate 4 of rectangle Erose ground connection board slot 5, ground connection board slot 5 top is isosceles trapezoid, bottom be three rectangles be spliced irregular Shape, the rectangular symmetrical that two of which shape is identical is distributed in the both sides of the narrower rectangle in middle part.

Preferably, described medium substrate 6 uses printed circuit board or uses flexible printed board to make.This The broadband trap antenna of utility model, in conjunction with Fig. 1, Fig. 2 and Fig. 3: the length range of the size of radiation patch 1: WU4 is 11.6- The length range of 13.6mm, LU4 be the length range that length range is 2.5-3.0mm, LU5 of 7.6-9.6mm, WU5 be 6- The length range of 6.5mm, WU3 is 6.5-7.5mm；

The length range of the size of parasitic structure 2: WC1 be the length range of 0.7-0.9mm, LC1 be 18.8-20.8mm, The length range of WC2 be the length range that length range is 11.0-12.0mm, LC3 of 0.3-0.5mm, LC2 be 1-2 millimeter, The length range of LC4 is 5-6mm；

The length range of the size of feed microstrip line structure 3: WU1 be the length range of 2.7-2.9mm, LU1 be 18- The length range of 22mm, WU2 be the length range that length range is 1.5-1.9mm, LU3 of 1.8-2.2mm, LU2 be 3-5mm；

The length range of the size of earth plate 4: LG is the length model that length range is 26-30mm, L1 of 30-34mm, WG Enclosing the length range that the length range that length range is 2.5-3.5mm, WS is 0.8-1.2mm, WT for 10-12mm, L2 is 6- The length range of 7mm, LR be the length range of 0.8-1.2mm, WR be 4.1-5.1mm.

With embodiment, this utility model is described further below in conjunction with the accompanying drawings:

Embodiment one

Comparison Fig. 4, Fig. 5, Fig. 6 and Fig. 7, utilize software I E3D that antenna is carried out emulation experiment.Emulation data acquisition medium The dielectric constant of substrate 6 is 2.65, and thickness is 1 millimeter, long LG=32 millimeter and wide WG=28 millimeter.

The size of radiation patch 1: WU4=12.6 millimeter, LU4=8.6 millimeter, WU5=2.8 millimeter, LU5=6.3 millimeter, WU3=7 millimeter.

The size of parasitic structure 2: WC1=0.8 millimeter, LC1=19.8 millimeter, WC2=0.4 millimeter, LC2=11.5 milli Rice, LC3=1.5 millimeter, LC4=5.5 millimeter.

The size of feed microstrip line structure 3: WU1=2.8 millimeter, LU1=20 millimeter, WU2=2 millimeter, LU2=1.7 milli Rice, LU3=4 millimeter.

The size of earth plate 4: LG=32 millimeter, WG=28 millimeter, L1=11 millimeter, L2=3 millimeter, WS=1 millimeter, WT =6.5 millimeters, LR=1 millimeter, WR=4.6 millimeter.

Experiment obtains reflection coefficient frequency characteristic as shown in Figure 4, and the result according to Fig. 4 is visible, beamwidth of antenna 2.75- Meet the requirement of ultra broadband between 12.5GHz, and achieve the trap characteristic in 4.9-6.5GHz frequency band by parasitic structure.

Accompanying drawing 5 (a) (b) sets forth the antenna antenna pattern at 2.9GHz and 4.4GHz.(a)-(e) of accompanying drawing 6 Sets forth the antenna antenna pattern at 7.5GHz, 8.5GHz, 9.5GHz, 10.5GHz and 11.5GHz.Accompanying drawing 5 and accompanying drawing Solid line in 6 is main polarization component.Accompanying drawing 7 gives the gain characteristic of 2-13GHz.Permissible by accompanying drawing 5, accompanying drawing 6 and accompanying drawing 7 Find out at working frequency range internal antenna, there is metastable radiation characteristic, and there is the gain-frequency characterisitic of relatively flat.

This utility model utilizes printed circuit board technology or integrated circuit technology, on medium substrate design radiating element and Earth plate, technique is simple, it is easy to manufacture.

The above is only some embodiments of the present utility model, it is noted that for the common skill of the art For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and Retouching also should be regarded as protection domain of the present utility model.

Claims

1. a broadband trap antenna, it is characterised in that: include medium substrate (6), the spoke that medium substrate (6) upside interconnects Penetrate unit and feed microstrip line structure (3) and the earth plate (4) of medium substrate (6) downside.

A kind of broadband the most according to claim 1 trap antenna, it is characterised in that: described radiating element includes medium base The radiation patch (1) at plate (6) middle part and be symmetrically distributed in the parasitic structure (2) of radiation patch (1) both sides.

A kind of broadband the most according to claim 2 trap antenna, it is characterised in that: the shape of described radiation patch (1) For " recessed " type, described parasitic structure (2) is symmetrically dispersed in the both sides of radiation patch (1), and shape is respectively to be connected by a horizontal stripe One long vertical bar and " h " type that falls of a short vertical bar, long vertical bar is the most concordant with the top of short vertical bar.

A kind of broadband the most according to claim 3 trap antenna, it is characterised in that: described feed microstrip line structure (3) Formed by two rectangles and one are trapezoidal, trapezoidal be positioned at two rectangular centres, the end and go to the bottom long with two respectively on it Square broadside is connected, and another broadside rectangular being connected with the trapezoidal upper end is connected with radiation patch (1).

A kind of broadband the most according to claim 1 trap antenna, it is characterised in that: described medium substrate (6) downside Rectangle earth plate (4) top has an erose ground connection board slot (5), and ground connection board slot (5) top is isosceles trapezoid, under Portion be three rectangles be spliced irregularly shaped, rectangular symmetrical that two of which shape is identical is distributed in the narrower rectangle in middle part Both sides.

A kind of broadband the most according to claim 1 trap antenna, it is characterised in that: described medium substrate (6) uses just Property printed circuit board (PCB) or use flexible printed board make.

A kind of broadband the most according to claim 3 trap antenna, it is characterised in that: described radiation patch (1) length WU4 Being 7.6-9.6mm for 11.6-13.6mm, highly LU4, the width WU3 of its inner recess is that 6.5-7.5mm, highly LU5 are 6-6.5mm, " recessed " type monosymmetric bossing width WU5 is 2.5-3.0mm.

A kind of broadband the most according to claim 3 trap antenna, it is characterised in that: the long vertical bar of described parasitic structure (2) Long LC1 be 18.8-20.8mm, wide WC1 is 0.7-0.9mm, and the long LC2 of short vertical bar is 11.0-12.0mm, and wide WC2 is 0.3- 0.5mm, the length range of distance LC3 of long vertical bar to short vertical bar edge is 1-2mm, to distance LC4 of horizontal stripe bottom long vertical bar Length range be 5-6mm.

A kind of broadband the most according to claim 4 trap antenna, it is characterised in that: in described feed microstrip line structure (3) The length range of trapezoidal high LU2 is 1.5-1.9mm, and the length range of the rectangular long LU3 being connected with the trapezoidal upper end is 3- 5mm, the length range of wide WU2 is 1.8-2.2mm, is 18-with the length range of the trapezoidal rectangular long LU1 going to the bottom and being connected 22mm, the length range of wide WU1 is 2.7-2.9mm.

A kind of broadband the most according to claim 5 trap antenna, it is characterised in that: the length of described earth plate (4) horizontal edge WG Degree scope is 26-30mm, and the length range of vertical edge LG is 30-34mm, and the horizontal edge of bottom is to ground connection board slot (5) bottom distance L1 Length range is 10-12mm, and vertical edge is 6-7mm to the length range of distance WT at ground connection board slot (5) top, and vertical edge is to earth plate The length range of groove (5) bottom WS is 0.8-1.2mm, the length range of the long WR of narrower rectangle in the middle of ground connection board slot (5) bottom For 4.1-5.1mm, the base of narrower rectangle is 0.8-1.2mm with the length range of distance LR on other two rectangle bases, two The length range of the rectangle width L2 that individual shape is identical is 2.5-3.5mm.