CN203434285U - Spoon-shape slotting type microstrip antenna - Google Patents

Abstract

The utility model discloses a spoon-shaped slotted microstrip antenna. It includes a substrate, a radiation patch, a microstrip line, an impedance matching input transmission line, and a rectangular metal grounding plate; the surface of the substrate is provided with a radiation patch, a microstrip line, and an impedance matching input transmission line; the back of the substrate is provided with a rectangular metal grounding plate; There is a rectangular opening on the rectangular metal ground plate; one end of the microstrip line is connected to the radiation patch, the other end of the microstrip line is connected to the impedance matching input transmission line, and one end of the impedance matching input transmission line is connected to the microstrip line, and the impedance matching input transmission line The other end of the ground plate is connected with the bottom end of the substrate, and the rectangular metal ground plate is connected with the bottom end of the substrate. The utility model has stable radiation characteristics in the working frequency band, low loss, simple structure, small volume and convenient manufacture.

Description

Spoon Slotted Microstrip Antenna

technical field

The utility model relates to an antenna, in particular to a spoon-shaped slotted microstrip antenna.

Background technique

The emergence of microstrip antenna is an important achievement in the application of modern microwave integrated circuit technology in the field of antenna in theory and practice. As early as 1953, Professor G.A. Deschamps of the United States had proposed the idea of a microstrip radiator. However, since the integration technology and dielectric substrate materials were not yet perfected at that time, great progress has not been made. It was not until the early 1970s that R.E.Munson and J.Q.Howell and others designed the first batch of practical microstrip antennas that microstrip antennas developed rapidly, and microstrip antennas with new forms and new performances continued to emerge.

Because the microstrip antenna is an antenna formed by adding a conductor patch on a dielectric substrate with a conductor ground plate. Therefore, it has unique advantages that conventional antennas such as reflector antennas do not have, such as thin profile, small size, light weight, low cost, can be easily placed on the instrument panel, and can conform to the surface of aircraft carriers such as missiles and satellites. In particular, it can be easily integrated with feed networks and active devices. In recent years, due to its unique advantages, microstrip antennas have been more and more widely used in the frequency domain from 100MHz to 100GHz. With the development of communication technology, the microstrip antenna has become an important member of the mobile terminal antenna family.

Contents of the invention

The utility model provides a spoon-shaped slotted microstrip antenna in order to overcome the disadvantages of large loss and low gain in the wireless local area network of the prior art.

In order to achieve the above object, the technical scheme of the utility model is as follows:

The spoon-shaped slotted microstrip antenna includes a substrate, a radiation patch, a microstrip line, an impedance matching input transmission line, and a rectangular metal ground plate; the surface of the substrate is provided with a radiation patch, a microstrip line, and an impedance matching input transmission line; There is a rectangular metal ground plate; there is a rectangular opening on the rectangular metal ground plate; one end of the microstrip line is connected to the radiation patch, the other end of the microstrip line is connected to the impedance matching input transmission line, and one end of the impedance matching input transmission line is connected to the microstrip line The other end of the impedance matching input transmission line is connected to the bottom end of the substrate, and the rectangular metal ground plate is connected to the bottom end of the substrate.

The substrate is made of glass fiber epoxy resin material, the length of the substrate is 35mm-37mm, and the width is 12mm-13mm. The long radius of the radiation patch is 7mm-8mm, and the short radius is 5mm-6mm. The length of the microstrip line is 12mm-13mm, and the width is 1mm-2mm. The impedance matching input transmission line has a length of 8 mm to 9 mm and a width of 3 mm to 4 mm. The length of the rectangular metal grounding plate is 18mm-19mm, and the width is 12mm-13mm. The length of the rectangular opening is 3mm-4mm, and the width is 2mm-3mm.

The utility model has stable radiation characteristics in the working frequency band, low loss, simple structure, small volume and convenient manufacture.

Description of drawings:

Figure 1 is a front view of the spoon-shaped slotted microstrip antenna;

Fig. 2 is the structure diagram of the back of the spoon-shaped slotted microstrip antenna;

Fig. 3 is a loss diagram of a spoon-shaped slotted microstrip antenna;

Figure 4 is the E-plane radiation pattern of the antenna at 3.3GHz;

Figure 5 is the H-surface radiation pattern of the antenna at 3.3GHz;

Figure 6 is the E-plane radiation pattern of the antenna at 9.0GHz;

Figure 7 is the H-plane radiation pattern of the antenna at 9.0GHz.

Detailed ways

As shown in Figures 1 and 2, the spoon-shaped slotted microstrip antenna includes a substrate 1, a radiation patch 2, a microstrip line 3, an impedance matching input transmission line 4, and a rectangular metal ground plate 5; the surface of the substrate 1 is provided with a radiation patch 2, microstrip line 3, impedance matching input transmission line 4; a rectangular metal ground plate 5 is provided on the back of the substrate 1; a rectangular opening 6 is provided on the rectangular metal ground plate 5; one end of the microstrip line 3 is connected to the radiation patch 2, The other end of the microstrip line 3 is connected to the impedance matching input transmission line 4, one end of the impedance matching input transmission line 4 is connected to the microstrip line 3, the other end of the impedance matching input transmission line 4 is connected to the bottom end of the substrate 1, and the rectangular metal ground plate 5 It is connected with the bottom end of the substrate 1.

The substrate 1 is made of glass fiber epoxy resin material, the length of the substrate 1 is 35mm-37mm, and the width is 12mm-13mm. The long radius of the radiation patch 2 is 7mm-8mm, and the short radius is 5mm-6mm. The microstrip line 3 has a length of 12 mm to 13 mm and a width of 1 mm to 2 mm. The impedance matching input transmission line 4 has a length of 8mm-9mm and a width of 3mm-4mm. The length of the rectangular metal grounding plate 5 is 18mm-19mm, and the width is 12mm-13mm. The length of the rectangular opening 6 is 3mm-4mm, and the width is 2mm-3mm.

Example 1

Spoon-shaped slotted microstrip antenna:

A glass fiber epoxy resin material with a dielectric constant of 4.2 is selected to make a microstrip substrate with a thickness of 1.7mm. The substrate has a length of 35 mm and a width of 12 mm. The radiation patch has a long radius of 7.5mm and a short radius of 5.5mm. The length of the microstrip line is 12mm and the width is 1.5mm. The impedance-matched input transmission line has a length of 8mm and a width of 3mm. The rectangular metal ground plate has a length of 18mm and a width of 12mm. The rectangular opening has a length of 3 mm and a width of 2 mm. Various performance indicators of the spoon-shaped slotted microstrip antenna are tested with CST software, and the loss curve obtained is shown in Figure 3. It can be seen from the figure that the working frequency bands below -10dB are 2.6GHz-4.15GHz and 7.9GHz-10GHz respectively. Figure 4-5 shows the E-plane and H-plane pattern of the spoon-shaped slotted microstrip antenna at 3.3GHz. It can be seen from the figure that when the frequency is 3.3GHz, the gain is 2.6dBi, and the half-power lobe width is 82.8 °; Figure 6-7 shows the E-plane and H-plane pattern of the spoon-shaped slotted microstrip antenna at 9.0GHz. It can be seen from the figure that when the frequency is 9.0GHz, the gain is 3.7dBi, and the half-power lobe width is 82.1°.

Claims (7)

1. A spoon-shaped slotted microstrip antenna is characterized in that it comprises a substrate (1), a radiation patch (2), a microstrip line (3), an impedance matching input transmission line (4), and a rectangular metal ground plate (5) ; The surface of the substrate (1) is provided with a radiation patch (2), a microstrip line (3), and an impedance matching input transmission line (4); the back side of the substrate (1) is provided with a rectangular metal ground plate (5); The floor (5) is provided with a rectangular opening (6); one end of the microstrip line (3) is connected to the radiation patch (2), and the other end of the microstrip line (3) is connected to the impedance matching input transmission line (4), and the impedance One end of the matching input transmission line (4) is connected to the microstrip line (3), the other end of the impedance matching input transmission line (4) is connected to the bottom end of the substrate (1), and the rectangular metal ground plate (5) is connected to the bottom of the substrate (1). connected at the bottom. 2. a kind of spoon-shaped slotted microstrip antenna as claimed in claim 1, is characterized in that described substrate (1) is glass fiber epoxy resin material, and the length of substrate (1) is 35mm～37mm, and width is 12mm ~ 13mm. 3. A spoon-shaped slotted microstrip antenna according to claim 1, characterized in that the long radius of the radiation patch (2) is 7 mm to 8 mm, and the short radius is 5 mm to 6 mm. 4. A spoon-shaped slotted microstrip antenna according to claim 1, characterized in that the length of the microstrip line (3) is 12 mm to 13 mm, and the width is 1 mm to 2 mm. 5. A spoon-shaped slotted microstrip antenna as claimed in claim 1, characterized in that the impedance-matched input transmission line (4) has a length of 8 mm to 9 mm and a width of 3 mm to 4 mm. 6. A spoon-shaped slotted microstrip antenna as claimed in claim 1, characterized in that the length of the rectangular metal ground plate (5) is 18mm-19mm, and the width is 12mm-13mm. 7. A spoon-shaped slotted microstrip antenna according to claim 1, characterized in that the length of the rectangular opening (6) is 3 mm to 4 mm, and the width is 2 mm to 3 mm.

Images