CN205081224U - Slotted fan-shaped microstrip antenna - Google Patents

Abstract

The utility model discloses a slotted fan-shaped microstrip antenna. It includes a substrate, a bow-shaped patch, a slotted inverted isosceles trapezoidal patch, an impedance matching input transmission line, an isosceles trapezoidal ground plane, a left semi-circular ground plane, and a right semi-circular ground plane; the upper surface of the substrate is provided with a bow-shaped patch, Slotted inverted isosceles trapezoidal patch, impedance-matched input transmission line; the bottom end of the bow-shaped patch is connected to the top of the slotted inverted isosceles trapezoidal patch, and the bottom end of the slotted inverted isosceles trapezoidal patch is connected to the impedance-matched input transmission line The bottom end of the impedance matching input transmission line is connected to the bottom end of the substrate. The lower surface of the substrate is provided with an isosceles trapezoidal ground plate, a left semi-circular ground plate, and a right semi-circular ground plate. The bottom end of the isosceles trapezoidal ground plate is connected to the The bottom ends of the substrates are connected. The microstrip substrate of the utility model uses epoxy resin material, and has the advantages of simple structure, small size, light weight, convenient manufacture, low cost, good radiation characteristics, and easy integration.

Description

Slotted fan-shaped microstrip antenna

technical field

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

Background technique

Since the first microstrip antenna came out in the 1970s, many scholars and researchers have carried out a lot of in-depth exploration and research on microstrip antennas. Nowadays, microstrip antennas work in the frequency band of 10MHz-100GHz in various industries and fields. Microstrip antennas have many advantages, such as small footprint, low antenna height, and easy to conform to the work surface; because the microstrip antenna uses printed circuit board technology, the antenna processing cost is low, and it is convenient for large-scale manufacturing; the antenna's The scattering cross section is small; a unidirectional radiation beam can be obtained; the maximum beam direction coincides with the normal direction of the patch plane; the microstrip antenna can also be integrated on the same circuit board with the PCB board circuit, eliminating the need for antenna The installation link reduces the production cost. With the vigorous development of the mobile communication industry, the demand for smaller and lower-profile antennas in various industries has pushed microstrip antennas to the forefront of the times.

The advantages of microstrip antennas are low profile, low cost, multifunctional, conformal, etc., can be integrated into radio equipment, can be used indoors or outdoors, and its size can be large or small. In many practical designs, the advantages of the microstrip antenna far outweigh its disadvantages, making it widely used and developed. It is believed that with the improvement of the understanding of the functions of microstrip antennas, microstrip antennas will be more widely used in a wider range of fields.

Contents of the invention

The utility model provides a slotted fan-shaped microstrip antenna, and the technical scheme is as follows:

Slotted fan-shaped microstrip antenna includes substrate, bow-shaped patch, slotted inverted isosceles trapezoidal patch, impedance matching input transmission line, isosceles trapezoidal ground plane, left semi-circular ground plane, right semi-circular ground plane; the upper surface of the substrate There are bow-shaped patches, slotted inverted isosceles trapezoidal patches, and impedance-matched input transmission lines; the bottom of the bow-shaped patch is connected to the top of the slotted inverted isosceles trapezoidal patch, and the slotted inverted isosceles trapezoidal patch is provided with Rectangular slot, the bottom edge of the rectangular slot is collinear with the upper bottom edge of the slotted inverted isosceles trapezoidal patch, the bottom end of the slotted inverted isosceles trapezoidal patch is connected to the top end of the impedance matching input transmission line, and the bottom end of the impedance matching input transmission line The end is connected with the bottom of the substrate, and the lower surface of the substrate is provided with an isosceles trapezoidal grounding plate, a left semi-circular grounding plate, and a right semi-circular grounding plate; The lower end of the right semi-circular grounding plate is connected to the right side of the upper end of the isosceles trapezoidal grounding plate, and the bottom end of the isosceles trapezoidal grounding plate is connected to the bottom end of the substrate.

The substrate is made of epoxy resin material, the length of the substrate is 21mm-23mm, and the width is 17mm-19mm. The bottom length of the arcuate patch is 9mm-11mm, and the height is 3.1mm-3.3mm. The slotted inverted isosceles trapezoidal patch is formed by opening a rectangular slot on the lower side of an inverted isosceles trapezoidal patch, wherein the length of the upper base of the inverted isosceles trapezoidal patch is 1 mm to 3 mm, and the length of the lower base is 9mm-11mm, height 7.4mm-7.6mm; length of rectangular slot 3.4mm-3.6mm, width 0.5mm-0.7mm. The impedance matching input transmission line has a length of 5.4 mm to 5.6 mm and a width of 1 mm to 3 mm. The length of the upper base of the isosceles trapezoidal grounding plate is 13mm-15mm, the length of the lower base is 17mm-19mm, and the height is 2mm-4mm. The size and shape of the left semi-circular grounding plate and the right semi-circular grounding plate are the same, with an outer diameter of 1.9 mm to 2.1 mm and an inner diameter of 1.4 mm to 1.6 mm.

The microstrip substrate of the utility model uses epoxy resin material, and has the advantages of simple structure, small size, light weight, convenient manufacture, low cost, good radiation characteristics, and easy integration.

Description of drawings:

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

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

Fig. 3 is the return loss diagram of slotted fan-shaped microstrip antenna;

Figure 4 is the radiation pattern of the E-plane and H-plane of the slotted fan-shaped microstrip antenna at 5.42 GHz;

detailed description

As shown in Figures 1 and 2, the slotted fan-shaped microstrip antenna includes a substrate 1, a bow-shaped patch 2, a slotted inverted isosceles trapezoidal patch 3, an impedance matching input transmission line 5, an isosceles trapezoidal ground plate 6, and a left semicircular ring Grounding plate 7, right semi-circular grounding plate 8; the upper surface of the substrate 1 is provided with a bow-shaped patch 2, a slotted inverted isosceles trapezoidal patch 3, and an impedance matching input transmission line 5; The top of the isosceles trapezoidal patch 3 is connected, the slotted inverted isosceles trapezoidal patch 3 is provided with a rectangular groove 4, the bottom edge of the rectangular groove 4 is collinear with the upper bottom edge of the slotted inverted isosceles trapezoidal patch 3, and the opening The bottom end of the grooved inverted isosceles trapezoidal patch 3 is connected to the top end of the impedance matching input transmission line 5, and the bottom end of the impedance matching input transmission line 5 is connected to the bottom end of the substrate 1, and the lower surface of the substrate 1 is provided with an isosceles trapezoidal grounding plate 6 , left semi-circular grounding plate 7, right semi-circular grounding plate 8; the lower end of the left semi-circular grounding plate 7 and the upper end left side of the isosceles trapezoidal grounding plate 6, the lower end of the right semi-circular grounding plate 8 and the isosceles trapezoidal grounding plate 6 The right side of the upper end of the isosceles trapezoidal ground plate 6 is connected with the bottom end of the substrate 1 .

The substrate 1 is made of epoxy resin material, the length of the substrate 1 is 21mm-23mm, and the width is 17mm-19mm. The bottom length of the bow-shaped patch 2 is 9mm-11mm, and the height is 3.1mm-3.3mm. The slotted inverted isosceles trapezoidal patch 3 is formed by opening a rectangular groove 4 on the lower side of an inverted isosceles trapezoidal patch, wherein the length of the upper base of the inverted isosceles trapezoidal patch is 1 mm to 3 mm, and the lower base The length is 9mm-11mm, the height is 7.4mm-7.6mm; the length of the rectangular slot 4 is 3.4mm-3.6mm, and the width is 0.5mm-0.7mm. The impedance matching input transmission line 5 has a length of 5.4 mm to 5.6 mm and a width of 1 mm to 3 mm. The length of the upper base of the isosceles trapezoidal grounding plate 6 is 13mm-15mm, the length of the lower base is 17mm-19mm, and the height is 2mm-4mm. The left semi-circular grounding plate 7 and the right semi-circular grounding plate 8 are of the same size and shape, with an outer diameter of 1.9 mm to 2.1 mm and an inner diameter of 1.4 mm to 1.6 mm.

Example 1

Slotted fan-shaped microstrip antenna:

Choose the epoxy resin material with a dielectric constant of 4.4 to make the microstrip substrate with a thickness of 1.5mm. The substrate has a length of 22 mm and a width of 18 mm. The arc patch has a base length of 10mm and a height of 3.2mm. The slotted inverted isosceles trapezoidal patch is formed by opening a rectangular slot on the lower side of an inverted isosceles trapezoidal patch. The upper base length of the inverted isosceles trapezoidal patch is 2mm, the lower base length is 10mm, and the height is 7.5 mm; the length of the rectangular slot is 3.5mm and the width is 0.6mm. The impedance-matched input transmission line is 5.5mm long and 2mm wide. The length of the upper base of the isosceles trapezoidal grounding plate is 14mm, the length of the lower base is 18mm, and the height is 3mm. The left semi-circular grounding plate and the right semi-circular grounding plate have the same size and shape, both have an outer diameter of 2 mm and an inner diameter of 1.5 mm. The various performance indicators of the slotted fan-shaped microstrip antenna are tested with CST software, and the return loss curve obtained is shown in Figure 3. It can be seen from the figure that the working frequency band below -10dB is 4.11GHz to 6.78GHz. Figure 4 shows the E-plane and H-plane patterns of the slotted fan-shaped microstrip antenna at 5.42GHz. It can be seen from the figure that the gain is 3.63dBi and the half-power lobe width is 41.8° when the frequency is 5.42GHz.

Claims (7)

1. a fluting fan microstrip, is characterized in that comprising substrate (1), arc paster (2), the fluting paster of falling isosceles trapezoid (3), impedance matching input transmission line (5), isosceles trapezoid ground plate (6), left semicircle annular ground plate (7), right semi-circle annular ground plate (8), the upper surface of substrate (1) is provided with arc paster (2), the fluting paster of falling isosceles trapezoid (3), impedance matching input transmission line (5), the bottom of arc paster (2) is connected with the top of the fluting paster of falling isosceles trapezoid (3), the fluting paster of falling isosceles trapezoid (3) is provided with rectangular channel (4), the base of rectangular channel (4) and the upper base conllinear of the fluting paster of falling isosceles trapezoid (3), the bottom of the fluting paster of falling isosceles trapezoid (3) is connected with the top that impedance matching inputs transmission line (5), the bottom of impedance matching input transmission line (5) is connected with the bottom of substrate (1), the lower surface of substrate (1) is provided with isosceles trapezoid ground plate (6), left semicircle annular ground plate (7), right semi-circle annular ground plate (8), left semicircle annular ground plate (7) lower end and isosceles trapezoid ground plate (6) upper end on the left of, the lower end of right semi-circle annular ground plate (8) is connected with on the right side of the upper end of isosceles trapezoid ground plate (6), and the bottom of isosceles trapezoid ground plate (6) is connected with the bottom of substrate (1).

2. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that described substrate (1) is epoxide resin material, the length of substrate (1) is 21mm ~ 23mm, and width is 17mm ~ 19mm.

3. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that the end length of described arc paster (2) is 9mm ~ 11mm, height is 3.1mm ~ 3.3mm.

4. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that the described fluting paster of falling isosceles trapezoid (3) forms by opening a rectangular channel (4) on the downside of a paster of falling isosceles trapezoid, wherein the upper bottom side length of the paster of falling isosceles trapezoid is 1mm ~ 3mm, the length of side of going to the bottom is 9mm ~ 11mm, is highly 7.4mm ~ 7.6mm; The length of rectangular channel (4) is 3.4mm ~ 3.6mm, and width is 0.5mm ~ 0.7mm.

5. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that described impedance matching input transmission line (5) length is 5.4mm ~ 5.6mm, width is 1mm ~ 3mm.

6. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that the upper bottom side length of described isosceles trapezoid ground plate (6) is 13mm ~ 15mm, the length of side of going to the bottom is 17mm ~ 19mm, is highly 2mm ~ 4mm.

7. a kind of fluting fan microstrip as claimed in claim 1, it is characterized in that described left semicircle annular ground plate (7), right semi-circle annular ground plate (8) size shape are identical, external diameter is 1.9mm ~ 2.1mm, and internal diameter is 1.4mm ~ 1.6mm.