CN2924811Y

CN2924811Y - Printed circuit board antenna

Info

Publication number: CN2924811Y
Application number: CN 200620069819
Authority: CN
Inventors: 李武
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2006-03-02
Filing date: 2006-03-02
Publication date: 2007-07-18
Anticipated expiration: 2016-03-02

Abstract

The utility model relates to a printed circuit board antenna, which includes a PCB base plate and a feeder line. The upper plate surface of the base plate is provided with a copper coated ring-shaped antenna oscillator, one end of the ring-shaped antenna oscillator is provided with a feed through hole which can be connected electrically, the feed through hole is electrically connected with a ground connection part which is arranged on the lower plate surface of the base plate through the base plate, the ground connection part can be various shape, and the ground connection part can also be designed to the proper shape according to the requirements of the circuit board, thus to make the structure of the antenna more compact and reasonable; the feeder line includes an inner core line and a shielding layer, one end of the inner core line is electrically connected with the feed of the ring-shaped antenna oscillator, and one end of the shielding layer is electrically connected with the ground connection part.

Description

PCB antenna

[technical field]

The utility model particularly relates to the PCB antenna of a kind of IEEE802.11b of being applied to about a kind of single-band antenna.

[background technology]

Along with the extensive use of WLAN (WLAN (wireless local area network)) at modern mobile office environment, the antenna that is installed on the portable communication apparatus is able to a large amount of uses, and the main flow wireless LAN communication agreement of Chan Shenging mainly comprises IEEE 802.11b and two kinds of standards of 802.11a thereupon, wherein the working frequency range of 802.11b is mainly 2.4-2.5GHz, and the working frequency range of 802.11a is contained 5.15-5.35GHz, because the microminiaturization of portable communication apparatus, inevitably, also microminiaturization correspondingly of the design of antenna.

The solution of antenna microminiaturization in the prior art, has become ripe development field.And adopt also successful Application of antenna that printed circuit (PCB) realized, be called big line of PCB or PCB antenna.The related art antenna comprises one deck substrate and prints two metal levels up and down on it, last metal level comprises the conductor belt of signal feed-in microstrip line and prolongs the conductor belt radiant section of four minutes one wavelength from this conductor belt one end, lower metal layer comprises the grounding parts of microstrip line and two sections four fens wavelength conductor belt radiant sections of its extension, signal source is by the microstrip line feed-in, and this antenna is applicable in general mobile phone, WLAN (wireless local area network) or other wireless telecommunications system.

Microstrip antenna is a kind of miniaturization built-in aerial that is applicable to mobile terminals, yet previous its radiation efficiency of single-frequency microstrip antenna of using is lower.

In order to improve radiation efficiency, its gain that makes simultaneously is bigger, the design of line has the employing loop antenna greatly now, the loop antenna superior performance, it is higher to gain, but, loop antenna is very high to the requirement of self, require the mechanism of self very tight, and loop antenna is fewer in the application in little big line field, have only the minority mobile phone to adopt, although and adopt its performance of antenna of this kind structure good slightly with gain,, this kind loop antenna be applied in the waste that causes in the mechanism to a great extent, and with the microminiaturization of existing electronic product, integrated trend does not conform to.

In view of this, be necessary to propose a kind of superior performance in fact and can improve radiation efficiency, increasing gain, and the microstrip antenna that is suitable for using.

[summary of the invention]

Therefore, the purpose of this utility model is to provide the PCB antenna of a kind of IEEE802.11b of being applied to, and it is little that this antenna has a volume, mechanism's adaptability is strong, and gain is big, superior performance, the radiation efficiency height, the work zone is roomy, and advantage such as cheap simple in structure.

The utility model provides a kind of PCB antenna, it comprises a PCB substrate and a feeder line, the upper face of this substrate is provided with copper-plated loop aerial oscillator, one end of this loop aerial oscillator is provided with the feed through hole that can electrically connect, this feed through hole sees through substrate and electrically connects with the grounding parts that is located at the substrate lower face, the grounding parts that this grounding parts can have any shape, also can this grounding parts be designed to suitable shape according to the demand of circuit board, the mechanism of this antenna that makes is compact and reasonable more, this feeder line comprises internal core wire and screen, this internal core wire one end is electrically connected at feed on the loop aerial oscillator, and this screen one end and grounding parts electrically connect.

Compared with prior art, the utility model PCB antenna adopts the loop aerial oscillator, and realizes that with the form of printed circuit board (PCB) this PCB antenna radiation efficiency that makes improves greatly, and the gain of this PCB antenna that also makes improves greatly; The grounding parts of this PCB antenna can be designed to corresponding shape as required, improved its mechanism's waste to a great extent, this PCB antenna that makes does not have the electromagnetic shielding of specific direction, and this PCB antenna radiation that makes has omni-directional; The utility model PCB antenna adopts this kind structure, and its volume that makes reduces greatly, and its mechanism's adaptability improves greatly.

The utility model PCB antenna adopts this kind structure, and its radiation that makes has omni-directional, and it is simple in structure, and is cheap, is easy to apply.

[description of drawings]

Fig. 1 is the loop aerial oscillator structural representation of the utility model PCB antenna.

Fig. 2 is the structural representation that the utility model PCB antenna is connected with feeder line.

Fig. 3 is the voltage standing wave ratio VSWR test schematic diagram of the utility model PCB antenna.

Fig. 4 is the electric field radiation test schematic diagram of the utility model PCB antenna.

Fig. 5 is the magnetic field radiation test schematic diagram of the utility model PCB antenna.

[embodiment]

Be described in detail below in conjunction with the structure of accompanying drawing the utility model PCB antenna.

See also Fig. 1, Fig. 2, Fig. 1 is the loop aerial oscillator structural representation of the utility model PCB antenna, and Fig. 2 is the structural representation that the utility model PCB antenna is connected with feeder line.

This PCB antenna comprises a PCB substrate 10 and a feeder line 50.The upper face of this substrate 10 is provided with copper-plated loop aerial oscillator 20, one end of this loop aerial oscillator 20 is provided with the feed through hole 40 that can electrically connect, this feed through hole 40 sees through substrate 10 and electrically connects (not shown) with the grounding parts 30 that is located at substrate 10 lower faces, this grounding parts 30 can have any shape, also can this grounding parts 30 be designed to suitable shape according to the demand of circuit board, the mechanism of this antenna that makes is compact and reasonable more.

Please continue to consult Fig. 2, Fig. 2 is the structural representation that the utility model PCB antenna is connected with feeder line.

This antenna also comprises a feeder line 50, this feeder line 50 is the coaxial cable structure, comprise internal core wire 51 and screen 52, and be provided with first insulating barrier between this internal core wire 51 and the screen 52, and be provided with second insulating barrier between the screen 52 and the external world around it, this screen 52 electrically connects (not shown) with grounding parts 30, and internal core wire 51 and first insulating barrier on every side are by behind the feed through hole 40, and internal core wire 51 is connected with loop aerial oscillator 20 feeds.

See also Fig. 3, Fig. 3 is voltage standing wave ratio (VoltageStanding Wave Ratio, VSWR) the test schematic diagram of the utility model PCB antenna.

By the test result of this figure as can be seen, when this PCB antenna is operated in frequency range and is 2.4-2.5GHz, the voltage standing wave ratio VSWR of this PCB antenna is not more than 2, so satisfy the IEEE802.11n consensus standard to antenna in the working frequency range scope, voltage standing wave ratio otherwise greater than 2.0 requirement.

See also Fig. 4, Fig. 5, Fig. 4 is the electric field radiation test schematic diagram of the utility model PCB antenna, and Fig. 5 is the magnetic field radiation test schematic diagram of the utility model PCB antenna.

Electric field when Fig. 4, Fig. 5 work in 2.45GHz for the utility model PCB antenna and magnetic field radiation test schematic diagram.This test result figure shows that the omnibearing operating angle of this antenna meets the requirements; And this antenna satisfies the requirement of IEEE 802.11b consensus standard to antenna gain.

The utility model PCB antenna adopts the loop aerial oscillator, and realizes that with the form of printed circuit board (PCB) this PCB antenna radiation efficiency that makes improves greatly, and the gain of this PCB antenna that also makes improves greatly; The grounding parts of this PCB antenna can be designed to corresponding shape as required, improved its mechanism's waste to a great extent, and this PCB antenna that makes does not have the electromagnetic shielding of specific direction, and this PCB antenna radiation that makes has omni-directional.

The utility model PCB antenna adopts this kind structure, and its volume that makes reduces greatly, and its mechanism's adaptability improves greatly.

Claims

1, a kind of PCB antenna, this antenna applications is in IEEE802.11b, it comprises an antenna oscillator, a grounding parts and the feed through hole that connects antenna oscillator and grounding parts, an and feeder line, this feeder line comprises internal core wire and screen, and between two-layer and screen outside insulating barrier, it is characterized in that: this antenna oscillator is the loop aerial oscillator that is printed on the circuit board.

2, PCB antenna according to claim 1 is characterized in that: an end of this loop aerial oscillator is provided with the feed through hole.