CN102738569A

CN102738569A - Broadband PCB (Printed Circuit Board) antenna

Info

Publication number: CN102738569A
Application number: CN201210092032XA
Authority: CN
Inventors: 周乐兵
Original assignee: Suzhou Wutong Antenna Co Ltd
Current assignee: Suzhou Wutong Antenna Co Ltd
Priority date: 2012-03-31
Filing date: 2012-03-31
Publication date: 2012-10-17

Abstract

The invention discloses a broadband PCB (Printed Circuit Board) antenna. The broadband PCB antenna comprises a PCB base material, wherein radiating surfaces, first vibrators, first grounding surfaces and second grounding surfaces are shallowly plated on the positive surface and the negative surface of the PCB base material through copper foils; the first grounding surfaces and the second grounding surfaces are both provided with first conductive through holes by which the first grounding surfaces and the second grounding surfaces can be electrically connected; the radiating surfaces comprise microstrip transmission lines, the second grounding surfaces and first vibrators, wherein the first vibrators are in twisty linear structures; one ends of the microstrip transmission lines is electrically connected with the first vibrators, and while the other ends of the microstrip transmission lines are respectively provided with a second conductive through hole; and the other ends of the microstrip transmission lines are electrically connected with the second vibrators through the second conductive through holes. The broadband PCB antenna is simple in structure, broad in band, low in manufacturing cost, and simple in installation; meanwhile, the broadband PCB antenna also has the advantages that the volume is small, the effect on resisting shaking is obvious and the like; and moreover, the broadband PCB antenna is superior to wireless communication in performance, and therefore, the broadband PCB antenna can be widely applied to 3G wireless transmission terminal products.

Description

A kind of wideband PCB antenna

Technical field

The present invention relates to a kind of improvement of antenna; Particularly a kind of implementation structure is simple, cost is low, and radiation effect is good, stable and reliable for performance, bandwidth; Can belong to signal transmission general character equipment unit field adaptable across the wideband PCB antenna in the unlimited transmission-wire terminal product of 3G.

Background technology

Continuous development along with wireless communication technique; Wireless terminal is constantly strengthened owing to function; The wireless module integrated level improves constantly; Communication device is constantly microminiaturized, and along with the maturation of 3G technology is popularized with using constantly, and the Antenna Design to the communicator of correspondence proposes requirements at the higher level like this---press for a kind of design that can satisfy the 3G multifrequency broadband needs in communication epoch, miniaturization, consistency, stability, affected by environment little, cost is lower, well behaved wide frequency antenna.

3G technology is constantly popularized at present, and 3G groundwork frequency range is TDSCDMA, WCDMA, can on a plurality of frequency ranges, work in order to make the single wireless terminal installation, how to let miniature antenna can have wide band effect.Become research staff's emphasis research topic.

Existing wireless terminal antenna is to cover the GSM900/GSM1800 frequency range mostly, and not only bandwidth is difficult to reach the 3G communicating requirement, and cost is high, making technology is complicated, unstable properties, narrow bandwidth.

To above-mentioned situation, a kind of broadband P CB antenna of research and design, this broadband P CB antenna is not only simple in structure, cost is low, and stable and reliable for performance, broadband, to overcome the defective of antenna in the prior art.

Summary of the invention

The present invention seeks to have proposed for the deficiency that overcomes prior art that a kind of implementation structure is simple, cost is low, and radiation effect is good, stable and reliable for performance, bandwidth can be adaptable across the wideband PCB antenna in the unlimited transmission-wire terminal product of 3G.

For achieving the above object; The technical scheme that the present invention adopts is: a kind of wideband PCB antenna; Comprise the PCB base material; With shallow radiating surface, second oscillator, first ground plane and second ground plane of being coated with of Copper Foil, said first ground plane and second ground plane are provided with the first conducting via hole respectively for the front of said PCB base material, reverse side, utilize this first conducting via hole that first ground plane and second ground plane are electrical connected; Said radiating surface; Comprise microstrip transmission line, second ground plane, first oscillator; And said first oscillator is tortuous linear structure; One end and first oscillator of said microstrip transmission line are electrical connected, and the other end is provided with the second conducting via hole, and the said microstrip transmission line other end is electrically connected with second oscillator through the said second conducting via hole.

Preferably, said first ground plane is a U type structure; The said second oscillator symmetry is positioned in first ground plane.

Preferably, said first oscillator and the second oscillator junction are provided with distributing point; The said microstrip transmission line other end is electrically connected with distributing point through the said second conducting via hole.

Because the utilization of technique scheme, the present invention compared with prior art has advantage:

Wideband PCB antenna of the present invention with respect to prior art, can make antenna from traditional cost is high, making technology is complicated, unstable properties, narrow bandwidth break through to simple in structure, broadband, cost of manufacture is low, installation is simple; In addition, this antenna structure also has advantages such as advantages of small volume, anti seismic efficiency are remarkable, and excellent wireless telecommunications performance, so can be in the unlimited transmission-wire terminal product of 3G.

Description of drawings

Below in conjunction with accompanying drawing technical scheme of the present invention is described further:

Fig. 1 is the partial sectional view of the front view of wideband PCB antenna according to the invention;

Fig. 2 is the partial sectional view of the rearview of wideband PCB antenna according to the invention;

Fig. 3 is the S11 performance plot of the antenna of prior art;

Fig. 4 is the S11 performance plot of wideband PCB antenna according to the invention;

Wherein: 1, radiating surface; 2, PCB base material; 3, first oscillator; 4, second oscillator; 5, microstrip transmission line; 6, feedback point; 7, first ground plane; 8, second ground plane; 9, the first conducting via hole; 10, the second conducting via hole.

Embodiment

Be depicted as a kind of wideband PCB antenna of the present invention like accompanying

drawing

1,2; A said wideband PCB antenna and a feeder line (meaning not shown in the figures) electrically connect; Said wideband PCB antenna comprises PCB base material 2; The front of said base material, reverse side are respectively with shallow radiating surface 1, second oscillator 4, first ground plane 7 and second ground plane 8 of being coated with of Copper Foil; Said first ground plane 7 and second ground plane 8 are provided with the first conducting via hole 9, utilize this first conducting via hole 9 that first ground plane 7 and second ground plane 8 are electrical connected; Said radiating surface 1; Comprise microstrip transmission line 5, second ground plane 8, first oscillator 3; And said first oscillator 3 is tortuous linear structure; One end of said microstrip transmission line 5 and first oscillator 3 are electrical connected, and the other end of said microstrip transmission line 5 is provided with the second conducting via hole 10, and the other end of said microstrip transmission line 5 is electrical connected through the said second conducting via hole 110 and second oscillator 4, feedback point 6 each other.Said second oscillator, 4 symmetries are positioned in first ground plane 7, and said ground plane 7 is " U " type structure.

Being depicted as the S11 performance plot of the antenna of prior art like accompanying drawing 3, is the S11 performance plot of a kind of wideband PCB of the present invention antenna.Accompanying drawing 4 is the S11 performance plot of wideband PCB antenna according to the invention; It is thus clear that the broadband effect of wideband PCB antenna of the present invention can make the operating frequency of antenna scope break through to the GSM850/900/1800/1900/WCDMA/TDS-CDMA frequency range from existing antenna technology GSM900/1800.Also take into account the working frequency range of CDMA/GPS standard simultaneously.Satisfy present 3G frequency multiplexing technique fully.In addition; Remarkable advantage such as that wideband PCB antenna of the present invention has is simple in structure, advantages of small volume, processing cost are low; And with the new ability of the wireless telecommunications of excellence, so can be widely used among the 2G, 3G wireless terminal product of standards such as GSM, CDMA, TDSCDMA, WCDMA.

The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims

1. wideband PCB antenna; It is characterized in that: comprise the PCB base material; The front of said PCB base material, reverse side are respectively with shallow radiating surface, second oscillator, first ground plane and second ground plane of being coated with of Copper Foil; Said first ground plane and second ground plane are provided with the first conducting via hole, utilize this first conducting via hole that first ground plane and second ground plane are electrical connected; Said radiating surface; Comprise microstrip transmission line, second ground plane, first oscillator; And said first oscillator is tortuous linear structure; One end and first oscillator of said microstrip transmission line are electrical connected, and the other end is provided with the second conducting via hole, and the said microstrip transmission line other end is electrically connected with second oscillator through the said second conducting via hole.

2. wideband PCB antenna according to claim 1 is characterized in that: said first ground plane is a U type structure; The said second oscillator symmetry is positioned in first ground plane.

3. wideband PCB antenna according to claim 1 is characterized in that: said first oscillator and the second oscillator junction are provided with distributing point; The said microstrip transmission line other end is electrically connected with distributing point through the said second conducting via hole.