CN1588698A - Small decoupling plane double antenna - Google Patents

Abstract

A small decoupling planar double antenna is used in the technical field of communication. Including: antenna unit, feed port, dielectric board and grounding unit, two antenna units, which are monopoles folded at 90 degrees, are located on the front of the dielectric board. There are two feeding ports, and each port is connected to an antenna unit. The grounding unit is composed of a grounding part on the front of the dielectric board, a grounding part on the back of the dielectric board, and a grounding part at the bottom of the dielectric board, and they are connected as a whole . The invention has the advantages of simple structure, small distance between antenna units, small mutual coupling, high antenna gain when the two antenna units are combined, and relatively uniform distribution within 360 degrees of the horizontal plane.

Description

Small Decoupled Planar Dual Antenna

technical field

The invention relates to an antenna used in the technical field of communication, in particular to a small decoupling planar dual antenna.

Background technique

In the prior art, an omnidirectional single antenna is commonly used in communication terminals, which has low gain and poor anti-interference ability. There are a small number of multi-antennas, but in order to eliminate the influence of mutual coupling, the distance between the antenna elements is very large. Therefore, the overall volume of the antenna is very large, and it is not easy to carry.

Through literature search, it is found that the patent application number is 02126816.9, the patent name is: a double antenna capable of controlling radiation characteristics in a foldable mobile communication terminal, and the patent publication number is 1399368. The first directional antenna, and the second directional antenna installed on the main body of the mobile communication terminal. This kind of dual antenna is actually only the second directional antenna that is always in working condition, while the first directional antenna is only used to assist in adjusting the radiation field of the mobile communication terminal during a call. The two antennas cannot be used as two independent antenna units, which also The gain of the antenna is very low when the non-talking state is made. On the other hand, due to the use of directional antennas, omnidirectional signal reception cannot be achieved even if the two antennas work simultaneously.

In the search, it was also found that Tayeb A. Denidni and others published "Experimental Investigations of a New Adaptive Dual-Antenna Array for Handset Applications" in IEEE TRANSACTIONS ONVEHICULAR TECHNOLOGY (vehicle technology), volume 52, No. 6, in November 2003. Experimental Research on Adaptive Dual-antenna Array for Mobile Phones)", using dual-antennas and adaptive algorithms to realize smart antennas in mobile terminals, the distance between the two antenna units is half a wavelength, and two independent antenna units can be realized. However, when the operating frequency is about 1000 MHz, the distance between the antenna elements is too large, and it is difficult to place the antenna on the mobile terminal.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies and defects in the prior art, and provide a small decoupling planar dual antenna to solve the problem of communication terminals using single antennas, low gain, poor anti-interference ability, and mobile terminals using multiple antennas. The still high problem of mutual coupling due to the close proximity of the units.

The present invention is realized through the following technical solutions, and the present invention includes: an antenna unit, a feeding port, a dielectric plate and a grounding unit. Two antenna units, which are monopoles folded at 90 degrees, are located on the front of the dielectric board. There are two feed ports. The core of each feed port is connected to an antenna unit. The grounding unit is located on the front of the dielectric board. The grounding part, the grounding part on the opposite side of the dielectric board and the grounding part on the bottom of the dielectric board are formed and communicated as a whole.

The two antenna units are located on the front of the dielectric board, distributed symmetrically, and there are chamfers at the bends of the antenna units.

The grounding part on the front of the dielectric plate is divided into three parts: left, middle and right. The left part has a shape with a boss on the left, the middle part has a shape with a boss in the middle, and the right part has a shape with a boss on the right.

The grounding part located on the front of the dielectric board is divided into three parts: left, middle and right. There is a gap between the left and middle parts. One antenna unit passes through this gap. There is a gap between the middle and right parts, and the other antenna unit passes through the gap. through this gap.

Both the antenna unit and the grounding unit are conductors, and the grounding unit is connected to the outer conductor of the feeding port.

The dielectric plate is a material with a high dielectric constant.

Compared with the prior art, the present invention has positive and obvious effects. A common ground with bosses is set between two antenna units, and bosses with adjustable antenna characteristics are added to the grounds on both sides of the antenna unit. Moreover, the antenna unit is bent to 90 degrees, and the outer chamfer is added to make the antenna unit spacing smaller and the mutual coupling smaller, becoming two independent antenna units; when the two antenna units are further combined into one antenna, due to the structure The symmetrical antenna element spacing is reduced and the mutual coupling is small, so that the antenna gain is high, and the antenna is evenly distributed within 360 degrees of the horizontal plane.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of a small decoupling planar dual antenna of the present invention

Fig. 2 is a schematic view of the bottom structure of a small decoupling planar dual antenna of the present invention

Fig. 3 is a schematic diagram of the back structure of a small decoupling planar dual antenna of the present invention

Detailed ways

As shown in Figure 1, the present invention includes: a first antenna unit 1, a second antenna unit 3, a first feed port 5, a second feed port 6, a dielectric plate 2 and a grounding unit 4, the first antenna unit 1, The second antenna unit 3 is a monopole folded at 90 degrees, all located on the front of the dielectric board 2, the core of the first feed port 5 is connected to the first antenna unit 1, and the core of the second feed port 6 is connected to the first antenna unit 1. The two antenna units 3 are connected, and the grounding unit 4 is composed of a grounding part on the front side of the dielectric board 2, a grounding part on the back side of the dielectric board and a grounding part on the bottom of the dielectric board, and is connected as a whole.

The two antenna units 1 and 3 are located on the front of the dielectric board 2 and distributed symmetrically, and the two antenna units 1 and 3 have chamfered corners at their bends.

The grounding unit part located on the front of the dielectric plate 2 is divided into left, middle and right parts, the left part has a shape with a boss on the left, the middle part has a shape with a boss in the middle, and the right part has a shape with a boss on the right .

The grounding unit part located on the front of the dielectric board 2 is divided into three parts: left, middle and right. There is a gap between the left and middle parts. The first antenna unit 1 passes through this gap. There is a gap between the middle and right parts. The second antenna unit 3 passes through this gap.

The two antenna units 1 and 3 and the grounding unit 4 are both conductors, and the grounding unit 4 is connected to the outer conductor of the first feeding port 5 .

The dielectric plate 2 is a material with a high dielectric constant.

Claims (6)

1. A small decoupling planar dual antenna, comprising: a first antenna unit (1), a second antenna unit (3), a dielectric plate (2) and a ground unit (4), a first feed port (5), The second feed port (6) is characterized in that the first antenna unit (1) and the second antenna unit (3) are monopoles folded into 90 degrees, all located on the front of the dielectric plate (2), feeding The core of the port (5) is connected to the first antenna unit (1), the core of the feed port (6) is connected to the second antenna unit (3), and the grounding unit (4) is formed by a The grounding unit, the grounding unit located on the opposite side of the dielectric board (2) and the grounding unit located at the bottom of the dielectric board (2) are formed and communicated as a whole. 2. The small decoupling planar dual antenna according to claim 1, characterized in that, the two antenna units (1, 3) are located on the front of the dielectric board (2), symmetrically distributed, and the two antenna units (1, 3) 3) There is a chamfer at the bend. 3. The small decoupling planar dual antenna according to claim 1, characterized in that the grounding part located on the front of the dielectric board (2) is divided into three parts: left, middle and right, and the left part is the one with a raised platform on the left. The middle part is a shape with a boss in the middle, and the right part is a shape with a boss on the right. 4. The small decoupling planar dual antenna according to claim 1, characterized in that, the grounding part located on the front of the dielectric board (2) is divided into three parts: left, middle and right, and there is a gap between the left and middle parts , the first antenna unit (1) passes through this gap, there is a gap between the middle and right parts, and the second antenna unit (3) passes through this gap. 5. The small decoupling planar dual antenna according to claim 1, characterized in that, the two antenna units (1, 3) and the grounding unit (4) are conductors, and the grounding unit (4) and the first The outer conductors of the feed ports (5) are connected. 6. The small decoupling planar dual antenna according to claim 1, characterized in that the dielectric plate (2) is a material with a high dielectric constant.

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