CN103794878B - Double layer substrate multiband paster antenna - Google Patents

Abstract

The invention discloses a double-layer substrate multi-band patch antenna. It includes an upper substrate, a lower substrate, a rectangular radiation patch, an impedance matching input transmission line, and a metal grounding plate; a circular slot is provided on the metal grounding plate, an upper substrate is provided on the upper surface of the metal grounding plate, and the lower surface of the metal grounding plate A lower substrate is provided; a rectangular radiation patch is arranged on the upper substrate; an impedance matching input transmission line is arranged on the lower substrate; the impedance matching input transmission line is connected to the bottom of the lower substrate. The invention has multiple frequency bands, low loss, good radiation characteristics, low cost, small size, easy fabrication and integration.

Description

Double-layer substrate multi-band patch antenna

technical field

The invention relates to an antenna, in particular to a double-layer substrate multi-band patch antenna.

Background technique

The antenna is an integral part of all wireless communication systems, responsible for converting the signal from the transmitter into electromagnetic waves for propagation to space, or converting electromagnetic signals in free space into high-frequency signals for receivers to receive, thereby Realize the space signal exchange process of wireless communication. With the continuous development of wireless communication technology and the continuous improvement of hardware research and development conditions, in order to better realize the transmission of wireless signals, higher requirements are placed on the performance of antennas. In today's environment where wireless communication equipment is widely used , the importance of antennas is increasing day by day, and the research on various antenna technologies and the requirements for higher technical indicators make antenna technology usher in another major opportunity for development.

In recent years, electronic devices with wireless communication functions have become more and more common, and various communication protocols have been formulated one by one. Many wireless communication frequency bands are open. Antennas built in electronic devices such as notebook computers must operate in multiple frequency bands. Different working frequency bands meet the needs of different wireless communication networks. Therefore, the design and optimization of multi-band antennas has become the development direction of wireless communication antennas.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a double-layer substrate multi-band patch antenna.

The double-layer substrate multi-band patch antenna includes an upper substrate, a lower substrate, a rectangular radiation patch, an impedance matching input transmission line, and a metal ground plate; a circular slot is provided on the metal ground plate, and an upper substrate is provided on the upper surface of the metal ground plate , the lower surface of the metal ground plate is provided with a lower substrate; the upper substrate is provided with a rectangular radiation patch; the lower substrate is provided with an impedance matching input transmission line; the impedance matching input transmission line is connected to the bottom of the lower substrate.

The substrate is made of glass fiber epoxy resin material, the length of the upper substrate and the lower substrate are both 60mm~62mm, and the width is 60mm~62mm. The length of the rectangular radiation patch is 22mm-24mm, and the width is 20mm-21mm. The length of the impedance matching input transmission line is 40mm-40.5mm, and the width is 2mm-2.5mm. The metal grounding plate has a length of 60mm~62mm and a width of 60mm~62mm. The radius of the circular slot is 4mm~4.5mm.

The invention has multiple frequency bands, low loss, good radiation characteristics, low cost, small size, easy manufacture and integration.

Description of drawings

Figure 1 is a front structural diagram of a multi-band patch antenna with a double-layer substrate;

Fig. 2 is a side structure diagram of a double-layer substrate multi-band patch antenna;

Fig. 3 is a back structure diagram of a multi-band patch antenna with a double-layer substrate;

Fig. 4 is the return loss diagram of the double-layer substrate multi-band patch antenna;

Figure 5 is the E-plane and H-plane radiation patterns of the double-layer substrate multi-band patch antenna at 6.296GHz;

Figure 6 is the E-plane and H-plane radiation patterns of the double-layer substrate multi-band patch antenna at 7.200 GHz;

Figure 7 is the E-plane and H-plane radiation patterns of the double-layer substrate multi-band patch antenna at 10.400 GHz;

Fig. 8 is the radiation pattern of the E plane and the H plane of the double-layer substrate multi-band patch antenna at 12.176 GHz.

detailed description

As shown in Figures 1 to 3, the double-layer substrate multi-band patch antenna includes an upper substrate 1, a lower substrate 2, a rectangular radiation patch 3, an impedance matching input transmission line 4, and a metal ground plate 5; The upper surface of the metal grounding plate 5 is provided with an upper substrate 1, the lower surface of the metal grounding plate 5 is provided with a lower substrate 2; the upper substrate 1 is provided with a rectangular radiation patch 3; the lower substrate 2 is provided with an impedance The matching input transmission line 4 ; the impedance matching input transmission line 4 is connected to the bottom end of the lower substrate 1 .

The upper substrate 1 and the lower substrate 2 have the same shape and size, and are made of glass fiber epoxy resin. The length of the upper substrate 1 and the lower substrate 2 are both 60mm~62mm, and the width is 60mm~62mm. The length of the rectangular radiation patch 3 is 22mm-24mm, and the width is 20mm-21mm. The impedance matching input transmission line 4 has a length of 40mm~40.5mm and a width of 2mm~2.5mm. The metal grounding plate 5 has a length of 60mm~62mm and a width of 60mm~62mm. The radius of the circular slot 6 is 4mm~4.5mm.

Example 1

Double-layer substrate multi-band patch antenna:

Choose a glass fiber epoxy resin material with a dielectric constant of 4.4 to make the substrate, with a thickness of 1.5mm. The upper substrate and the lower substrate have the same shape and size, both have a length of 60mm and a width of 60mm. The rectangular radiation patch has a length of 22 mm and a width of 20 mm. The impedance-matched input transmission line is 40mm in length and 2mm in width. The length of the metal ground plate is 60mm and the width is 60mm. The radius of the circular slot is 4mm. Various performance indicators of the double-layer substrate multi-band patch antenna are tested with CST software, and the return loss curve obtained is shown in Figure 4. It can be seen from the figure that the working frequency band below -10dB is 6.275GHz~6.317GHz, 7.153GHz~7.256GHz, 10.375GHz~10.433GHz, 12.132GHz~12.217GHz. Figure 5 shows the E-plane and H-plane pattern of the double-layer substrate multi-band patch antenna at 6.296GHz. It can be seen from the figure that when the frequency is 6.296GHz, the gain is 7.769dBi, and the half-power lobe width is 51.5° . Figure 6 shows the E-plane and H-plane pattern of the double-layer substrate multi-band patch antenna at 7.200GHz. It can be seen from the figure that at the frequency of 7.200GHz, the gain is 6.611dBi, and the half-power lobe width is 59.7° . Figure 7 shows the E-plane and H-plane pattern of the double-layer substrate multi-band patch antenna at 10.400GHz. It can be seen from the figure that at the frequency of 10.400GHz, the gain is 6.282dBi, and the half-power lobe width is 70.8° . Figure 8 shows the E-plane and H-plane pattern of the double-layer substrate multi-band patch antenna at 12.176GHz. It can be seen from the figure that when the frequency is 12.176GHz, the gain is 8.801dBi, and the half-power lobe width is 28.7° .

Claims (1)

1. a double layer substrate multiband paster antenna, it is characterised in that include top substrate layer (1), underlying substrate (2), rectangle radiation patch (3), impedance matching input transmission line (4), metal ground plate (5)；Metal ground plate (5) is provided with rounded groove (6), and the upper surface of metal ground plate (5) is provided with top substrate layer (1), and the lower surface of metal ground plate (5) is provided with underlying substrate (2)；Top substrate layer (1) is provided with rectangle radiation patch (3)；Underlying substrate (2) is provided with impedance matching input transmission line (4)；Impedance matching input transmission line (4) is connected with the bottom of underlying substrate (1)；Described top substrate layer (1) is identical with the shape size of underlying substrate (2), is glass-epoxy material, and length is 60mm ~ 62mm, and width is 60mm ~ 62mm；A length of 22mm ~ the 24mm of described rectangle radiation patch (3), width is 20mm ~ 21mm；A length of 40mm ~ the 40.5mm of described impedance matching input transmission line (4), width is 2mm ~ 2.5mm；A length of 60mm ~ the 62mm of described metal ground plate (5), width is 60mm ~ 62mm；The radius of described rounded groove (6) is 4mm ~ 4.5mm.