CN201421884Y - dual frequency antenna - Google Patents

Abstract

The utility model discloses a dual-band antenna, it includes the radiation body, is equipped with first clearance, second clearance and third clearance on the radiation body. The radiation body is provided with a first side edge and a second side edge which are opposite, and a third side edge and a fourth side edge which are opposite. The first gap is in a step shape, one end of the first gap is communicated with the outside at the first side edge, the other end of the first gap is arranged in a region where the second side edge is connected with the third side edge, the second gap is arranged in a region where the second side edge of the radiation body is connected with the third side edge, one end of the second gap is connected with the other end of the first gap, the third gap is arranged at the edge of the second side edge of the radiation body in parallel, one end of the third gap is connected with the other end of the second gap, and the other end of the third gap is arranged in. Because the setting up of first clearance, second clearance and third clearance can make radiation body resonate in high frequency band and low frequency band, consequently, the utility model discloses dual-frenquency antenna's simple structure.

Description

dual frequency antenna

technical field

The utility model relates to an antenna, in particular to a dual-frequency antenna.

Background technique

Due to the development of mobile communication and the popularization of electronic devices, it has become a basic requirement of mobile communication to be able to send and receive signals of multiple different frequency bands through a single antenna.

With the advancement of wireless communication, the development of wireless communication services in various countries, and the combination of wireless communication and wired networks, the rapid development of the wireless communication market has become a trend, and has become a major industry in related industries, such as the telecommunications service industry, computer industry, software industry, etc. Competing focus. Among them, Global System for Mobile Communications (Global System for Mobile Communications, GSM) is currently the most widely used communication standard.

The frequency bands currently used for the global mobile communication system include GSM900MHz and DCS1800MHz.

In the global mobile communication system, the communication product most related to daily life is the mobile phone. Due to the demand for thinner mobile phones, the antenna is gradually developing towards a simpler structure.

Utility model content

The purpose of the utility model is to provide a dual-frequency antenna with simple structure.

In order to achieve the above object, the dual-frequency antenna provided by the utility model includes a radiation body, the radiation body is provided with a first gap, a second gap and a third gap, and the radiation body is provided with opposite first side and second side and the opposite third side and the fourth side, the third side and the fourth side are respectively connected to the first side and the second side. The first gap is stepped, one end of which is set on the first side of the radiation body and communicates with the outside, the other end is set in the area where the second side of the radiation body connects with the third side, and the second gap is set on the side of the radiation body The area where the second side is connected to the third side has one end connected to the other end of the first gap, and the third gap is arranged parallel to the edge of the second side of the radiation body, one end of which is connected to the other end of the second gap, and the other end It is located in the area connecting the second side and the fourth side.

Due to the arrangement of the first gap, the second gap and the third gap, the radiation body forms the first radiation part, the second radiation part and the third radiation part, so that the dual-frequency antenna of the present invention can resonate in the high frequency band and the low frequency band. Therefore, the structure of the dual-frequency antenna of the present invention is simple.

Description of drawings

In the accompanying drawings of the manual:

FIG. 1 is a schematic diagram of the dual-frequency antenna of the present invention.

Fig. 2 is the voltage standing wave ratio (Voltage StandingWave Ratio, VS WR) test diagram of the dual-frequency antenna of the present invention.

FIG. 3 is an efficiency test chart of the dual-frequency antenna of the present invention.

FIG. 4 is a test chart of the peak equivalent isotropic radiated power (PeakEIRP) of the dual-frequency antenna of the present invention.

The reference numerals of each element in the figure are explained as follows:

Dual frequency antenna 100 radiating body 2

Feeding part 4 Grounding part 6

Clearance 8 First Side 10

Second side 12 Third side 14

Fourth side 16 First gap 18

Second gap 20 Third gap 22

Section 1 24 Section 2 26

Section 3 28 Section 4 30

Section 5 32 Section 6 34

The first radiation department 36 The second radiation department 38

The third radiation department 40

Detailed ways

The following describes the technical content, structural features, objectives and effects of the present utility model in detail with reference to the embodiments and accompanying drawings.

Please refer to FIG. 1 , the dual-frequency antenna 100 of the present invention is made of stamped metal foil, and the dual-frequency antenna 100 is provided with a radiation body 2 , a feeding part 4 and a grounding part 6 . The radiating body 2 is roughly rectangular, and has a gap 8, a first side 10, a second side 12, a third side 14, and a fourth side 16. The first side 10 and the second side 12 are opposite to each other. The third side 14 and the fourth side 16 are opposite to each other and connected to two sides of the first side 10 and the second side 12 .

The gap 8 is opened on the first side 10 of the radiation body 2 and extends toward the inside of the radiation body 2 , the feeding part 4 and the grounding part 6 are adjacent to each other and extend to connect the first side 10 and the third side 14 of the radiation body 2 place. The feed-in portion 4 and the ground portion 6 extend from the third side 14 and are curved so as to abut against the contacts of the circuit board. The radiation body 2 , the feed-in portion 4 and the ground portion 6 are integrally formed by metal foil stamping.

The gap 8 is composed of a first gap 18 , a second gap 20 and a third gap 22 . The first gap 18 is stepped, opened on the first side 10 of the radiation body 2 and extends toward the junction of the second side 12 and the third side 14, and the second gap 20 is arranged on the second side 12 and the third side. The junction of the sides 14, and communicates with the first gap 18 and the third gap 22, the third gap 22 is roughly elongated, arranged near the second side 12 of the radiation body 2, and is roughly parallel to the second side 12. The third gap 22 extends from the junction of the second side 12 and the third side 14 toward the junction of the second side 12 and the fourth side.

The first gap 18 is composed of a first section 24, a second section 26, a third section 28 and a fourth section 30. One end of the first section 24 is connected to the first side 10 of the radiation body 2, and the second One end of the section 26 is connected to the other end of the first section 24, the other end of the second section 26 extends toward the third side 14 of the radiation body 2, one end of the third section 28 is connected to the other end of the second section 26, and the third section The other end of the section 28 extends toward the second side 12 of the radiation body 2, one end of the fourth section 30 communicates with the other end of the third section 28, and the other end of the fourth section 30 extends toward the third side 14 of the radiation body 2 and It communicates with one end of the second gap 20 .

The third gap 22 is composed of a fifth section 32 and a sixth section 34. The fifth section 32 is in the shape of a strip, and is arranged at the edge of the second side 12 of the radiation body 2 and is parallel to the second side. 12. One end of the fifth section 32 communicates with the other end of the second gap 20, and the other end of the fifth section 32 extends toward the joint between the second side 12 and the fourth side 16 of the radiation body 2, and communicates with the sixth section 34 One end, the sixth zone end 34 is disposed adjacent to the fourth side 16 of the radiation body 2 and parallel to the fourth side 16 .

In this embodiment, the first section 24, the third section 28, the second gap 20 and the sixth section 34 are arranged parallel to each other, and the second section 26, the fourth section 30 and the fifth section 32 are parallel to each other. set up.

The first side 10 , the third side 14 and the first gap 18 define a first radiation portion 36 on the radiation body 2 . The second side 12, the third side 14, the fourth side 16, the second gap 20 and the third gap 22 define a second radiation portion 38 on the radiation body 2, the first side 10, the fourth side The side 16 and the first gap 18 define a third radiation portion 40 on the radiation body 2 .

When the dual-band antenna 100 is used for wireless communication, the first radiating part 36 can resonate a high frequency band covering 1800 MHz, and the second radiating part 38 and the third radiating part 40 can resonate a low frequency band covering 900 MHz. Since the first gap 18 can change the electrical characteristics of the first radiating portion 36 and the third radiating portion 40 , thereby changing the coverage of the high frequency band and the low frequency band. Wherein, since the third gap 22 can change the electrical characteristics of the second radiating portion 38, thereby changing the coverage of the low frequency band; since the first section 24 of the gap 8 can change the electrical characteristics of the first radiating portion 36, thus changing the high frequency The coverage of the frequency band. In a specific implementation, the dual-frequency antenna 100 can be printed on a circuit board, and the radiation body 2 can be circular or in other shapes.

Please refer to FIG. 2 , which is a voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR) test chart of the dual-band antenna 100 . When the dual-frequency antenna 100 operates at 880MHz, the VSWR is 2.5072 (Mkr1 among the figures), and when the dual-frequency antenna 100 operates at 960MHz, the VSWR is 2.1188 (Mkr2 among the figures), when the dual-frequency antenna 100 operates At 1710MHz, the VSWR is 3.4035 (Mkr3 in the figure), and when the dual-band antenna 100 operates at 1880MHz, the VSWR is 3.7516 (Mkr4 in the figure). Therefore, the dual-band antenna 100 can cover the 900MHz frequency band and the 1800MHz frequency band specified by GSM.

Please refer to FIG. 3 , which is an efficiency test chart of the dual-band antenna 100 . When the dual-band antenna 100 operates between 900 MHz and 1800 MHz, its efficiency is approximately between 34.77% and 62.27%.

Please refer to FIG. 4, which is a peak equivalent isotropic radiated power (PeakEIRP) test chart of the dual-band antenna 100. When the dual-band antenna 100 operates in the 900MHz frequency band and 1800MHz, its peak equivalent isotropic radiated power is approximately between - Between 1.70 decibel milliwatts and 3.45 decibel milliwatts (dBm). Therefore, the dual-band antenna 100 can stably operate in the 900MHz frequency band and the 1800MHz frequency band specified by GSM.

From the above description, the radiation body 2 of the dual-band antenna 100 can define the first radiation part 36 resonating in the high frequency band, the second radiation part 38 and the third radiation part 40 resonating in the low frequency band through the gap 8 . Therefore, the structure of the dual-band antenna 100 of the present invention is simple.

Claims (6)

1. A dual-frequency antenna, comprising a radiation body, the radiation body is provided with a first gap, a second gap and a third gap, and is characterized in that: The radiation body is provided with a first side and a second side opposite to each other and a third side and a fourth side opposite, and the third side and the fourth side are connected to the first side and the fourth side respectively. both sides of the second side; The first gap is stepped, one end of which is opened on the first side of the radiation body and communicates with the outside, and the other end is set in the area where the second side and the third side of the radiation body connect; The second gap is arranged in the area where the second side and the third side of the radiation body are connected, one end of which is connected to the other end of the first gap; and The third gap is arranged parallel to the edge of the second side of the radiation body, one end of the third gap is connected to the other end of the second gap, and the other end of the third gap is arranged at the point where the second side connects to the fourth side area. 2. The dual-frequency antenna according to claim 1, wherein the first gap comprises: A first section, parallel to the third side and the fourth side of the radiation body, one end of which is opened on the first side of the radiation body and communicates with the outside; A second section, parallel to the first side and the second side of the radiation body, one end of which is connected to the other end of the first section; a third section, parallel to the first section, with one end connected to the other end of the second section; and A fourth section, parallel to the second section; one end of the fourth section is connected to the other end of the third section, and the other end of the fourth section is arranged on the second side of the radiation body and connected to the third side Area. 3. The dual-band antenna according to claim 2, wherein the second gap is parallel to the first section and the third section of the first gap. 4. The dual-band antenna according to claim 2, characterized in that: the third gap comprises: A fifth section, in the shape of a strip, arranged parallel to the edge of the second side of the radiation body; one end of the fifth section is connected to the other end of the second gap, and the other end of the fifth section is arranged on the radiation body The region where the second side of and the fourth side of ; and A sixth section is arranged parallel to the edge of the fourth side of the radiation body, one end of which is connected to the other end of the fifth section. 5 . The dual-band antenna according to claim 1 , wherein a feeding portion and a grounding portion adjacently arranged extend from the area connecting the first side and the third side of the radiating body. 6 . 6 . The dual-band antenna according to claim 5 , wherein the feed-in portion and the ground portion are curved and extend on the third side of the radiation body. 7 .

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