CN209389214U - Miniaturized Low Profile Broadband Directional Antenna for WiFi and WiMAX - Google Patents

Abstract

The utility model relates to a miniaturized low-profile broadband directional antenna applied to WiFi and WiMAX, comprising a radiation patch and a reflector patch arranged up and down, the radiation patch is the main part of the antenna, and the reflector patch is used to realize the antenna Directional radiation, two slots are set on the reflector patch from the inside to the outside, which are the inner slot and the outer slot respectively. This antenna has a simple structure and a reasonable design. It covers the wireless LAN WiMAX/WiFi frequency band. Applied in mobile terminal equipment.

Description

Miniaturized Low Profile Broadband Directional Antenna for WiFi and WiMAX

technical field

The utility model relates to a miniaturized low-profile broadband directional antenna applied to WiFi and WiMAX, and relates to the technical field of wireless communication.

Background technique

WLAN (Wide Local Area Network) is an important part of the wireless communication system. As an access method of the wireless network, the WLAN has the advantages of high efficiency, convenience, and low cost. With the further development of the wireless transmission system, It has been widely used and researched.

Wireless local area network needs to convert electrical signals into radio waves that can propagate in space for transmission. The radio wave transmission and reception needs to use the antenna of the device. Therefore, the antenna is an important part of it, and its performance will affect the radio. The quality of sending and receiving signals will directly affect the performance of the entire wireless communication system.

In recent years, antennas capable of working in WLANs have been proposed in large numbers. For example, a dual-frequency antenna realized by a planar inverted F structure; a microstrip antenna structure using a probe feeding structure, and dual-frequency transmission can be realized by selecting an appropriate feeding point; a structure such as a microstrip line feeding and a planar monopole antenna The antenna, which places the ground plane and the feeder on both sides of the dielectric board, realizes dual-band and triple-band.

In order to meet the ever-increasing WLAN application requirements, engineers need to design WLAN antenna units that can be used in different environmental backgrounds of WLAN. WLAN terminal equipment will develop in the direction of miniaturization, broadband, and low profile. The working frequency band of WLAN also requires antennas to have multi-band characteristics. Therefore, it is of great significance and broad application prospect to design an antenna for wireless local area network with the advantages of miniaturization, wide frequency band, and low profile.

Contents of the invention

The utility model proposes a miniaturized low-profile broadband directional antenna applied to WiFi and WiMAX.

The solution adopted by the utility model to solve the technical problem is that a miniaturized low-profile broadband directional antenna applied to WiFi and WiMAX includes a radiation patch and a reflector patch arranged up and down, and the radiation patch is the main part of the antenna. The reflector patch is used to realize the directional radiation of the antenna, and two slots are opened on the reflector patch from the inside to the outside, which are respectively an inner slot and an outer slot.

Further, the radiation patch includes a rectangular frame patch, a T-shaped branch, an arrow-shaped branch, an inverted L-shaped branch, and a monopole radiation patch, and the T-shaped branch and the inverted L-shaped branch are respectively connected to the rectangular frame The sides of the patch, and the T-shaped branch and the inverted L-shaped branch are all located in the rectangular frame patch.

Further, the inner slit is wider than the outer slit; or the inner slit is not wider than the outer slit.

Further, the inner slit and the outer slit are in a closed ring shape.

Further, the arrow-shaped branch is printed on the upper left corner inside the rectangular frame patch, and is not connected with the rectangular frame patch, the inverted L-shaped branch is located at the lower left corner inside the rectangular frame patch, and the two ends of the inverted L-shaped branch The lower side and the left side of the rectangular frame patch are respectively connected, and one end of the T-shaped branch is connected to the right side of the rectangular frame patch.

Further, the rectangular frame patch is a non-closed rectangular frame patch, with a gap in the middle of the lower side, and the monopole radiation patch has a left-right symmetrical structure, and the monopole radiation patch consists of two upper and lower sides. The rectangular patch on the upper side is wider than the rectangular patch on the lower side, and the lower end of the rectangular patch on the lower side is located in the gap, and the gap and the monopole radiation patch form a feeding point A.

Further, an air layer is provided between the radiation patch and the reflector patch.

Further, the radiation patch is printed on the upper surface of the first dielectric substrate, and the reflector patch is printed on the lower surface of the second dielectric substrate.

Further, an air layer is provided between the first dielectric substrate and the second dielectric substrate.

Compared with the prior art, the utility model has the following beneficial effects: simple structure, reasonable design, coverage of wireless local area network WiMAX/WiFi frequency band, good performance, small size, suitable for application in mobile terminal equipment.

Description of drawings

Below in conjunction with accompanying drawing, the utility model patent is further described.

Fig. 1 is the structure diagram of this antenna;

2 is a schematic structural view of the upper surface of the first dielectric substrate;

3 is a schematic structural view of the lower surface of the second dielectric substrate;

Figure 4 is a schematic diagram of the area where the radiation patch is located when looking down on the antenna;

Fig. 5 is a schematic diagram of the area where the reflector patch is located when looking down on the antenna;

Fig. 6 is the simulation result diagram of the reflection coefficient S(1,1) of this antenna, and Freq represents the frequency;

Figure 7 is the XOZ plane pattern of the antenna;

Figure 8 is the YOZ plane pattern of the antenna;

Fig. 9 is a graph showing the simulation results of the antenna gain and radiation efficiency.

In the figure: 1-first dielectric substrate; 2-second dielectric substrate; 3-radiation patch; 31-rectangular frame patch; 32-T-shaped branch; 33-arrow-shaped branch; 34-inverted L branch; 35- Monopole radiator patch; 4-reflector patch; 41-inner slot; 42-outer slot; 5-air layer; A-feed point.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Figure 1-9, a miniaturized low-profile broadband directional antenna applied to WiFi and WiMAX, including radiation patches and reflector patches set up and down, the radiation patch is the main part of the antenna, and the reflector patch is used In order to realize the directional radiation of the antenna, two slots are opened on the reflector patch from the inside to the outside, which are respectively the inner slot and the outer slot.

Further, the radiation patch includes a rectangular frame patch, a T-shaped branch, an arrow-shaped branch, an inverted L-shaped branch, and a monopole radiation patch, and the T-shaped branch and the inverted L-shaped branch are respectively connected to the rectangular frame The sides of the patch, and the T-shaped branch and the inverted L-shaped branch are all located in the rectangular frame patch.

In this embodiment, the inner slot is wider than the outer slot; or the inner slot is not wider than the outer slot.

In this embodiment, the inner slit and the outer slit are in a closed ring shape. Preferably, the inner slit and the outer slit are in the shape of a rectangular ring, but not limited thereto.

In this embodiment, the arrow-shaped branch is printed on the upper left corner inside the rectangular frame patch, and is not connected with the rectangular frame patch. The inverted L-shaped branch is located at the lower left corner inside the rectangular frame patch, and the inverted L-shaped The two ends of the branches are respectively connected to the lower side and the left side of the rectangular frame patch, and one end of the T-shaped branch is connected to the right side of the rectangular frame patch.

In this embodiment, the rectangular frame patch is a non-closed rectangular frame patch, and a gap is provided in the middle of its lower side, and the monopole radiation patch has a left-right symmetrical structure, and the monopole radiation patch has a It consists of two rectangular patches, the upper rectangular patch is wider than the lower rectangular patch, and the lower end of the lower rectangular patch is located in the gap. The two ends of the non-closed rectangular frame of the gap and the lower end of the rectangular patch form a feed point A. .

In this embodiment, an air layer is provided between the radiation patch and the reflector patch.

In this embodiment, the radiation patch is printed on the upper surface of the first dielectric substrate, and the reflector patch is printed on the lower surface of the second dielectric substrate.

In this embodiment, an air layer is provided between the first dielectric substrate and the second dielectric substrate, both of the first dielectric substrate and the second dielectric substrate are FR4 dielectric substrates, and the first dielectric substrate and the second dielectric substrate are connected through connecting columns .

In this embodiment, the length of the antenna is 30-45mm, the width is 30-45mm, and the height is 3-5mm, which is much smaller than the existing antennas and realizes miniaturization.

In this embodiment, the thicknesses of the first dielectric substrate and the second dielectric substrate are 0.5-1.5 mm. The outer edge length of the rectangular frame patch 31 is 28-35mm, the inner edge length is 20-25mm, the size of the reflector patch 4 is 35-45mm×35-45mm, the inner slit width is 2-3mm, and the outer slit width is 0.5 mm. -1.5mm, the height of the air layer 5 between the two dielectric substrates is 0-5mm. When looking down or looking up at the antenna, the outer slit overlaps the rectangular frame patch, the inner slit is located inside the rectangular frame patch, and the outer periphery of the inner slit overlaps the inner side of the rectangular frame patch.

In this embodiment, the structure of the radiation patch is designed as coplanar waveguide feeding, which can realize the wide impedance bandwidth of the antenna. At the same time, the design of the reflector patch structure realizes the directional radiation while the antenna is thin (low profile) and Antenna broadband can be guaranteed.

The above preferred embodiments have further described the purpose, technical solutions and advantages of the utility model in detail. It should be understood that the above descriptions are only preferred embodiments of the utility model and are not intended to limit the utility model. For new models, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (9)

1. a kind of miniaturization low section broadband beam antenna applied to WiFi and WiMAX, it is characterised in that: including setting up and down Radiation patch, reflector patch, radiation patch be antenna body part, reflector patch for realizing antenna orientation spoke It penetrates, opens up two slots on the reflector patch from the inside to the outside, respectively interior gap, outer gap.

2. the miniaturization low section broadband beam antenna according to claim 1 applied to WiFi and WiMAX, feature exist In: the radiation patch includes rectangle frame patch, a T shape minor matters, an arrow-shaped minor matters, an inverted L-shaped minor matters, a monopole Radiation patch, T shape minor matters and inverted L-shaped minor matters are separately connected the side of rectangle frame patch, and T shape minor matters and inverted L-shaped minor matters all positions In in rectangle frame patch.

3. the miniaturization low section broadband beam antenna according to claim 1 applied to WiFi and WiMAX, feature exist In: interior gap is than outer slit width；Or interior gap is not wider than outer gap.

4. the miniaturization low section broadband beam antenna according to claim 3 applied to WiFi and WiMAX, feature exist In: interior gap, outer gap are in the ring-type being closed.

5. the miniaturization low section broadband beam antenna according to claim 2 applied to WiFi and WiMAX, feature exist In: the arrow-shaped minor matters are printed on the upper left corner on the inside of rectangle frame patch, and are not connected with rectangle frame patch, inverted L-shaped branch The lower left corner of the section on the inside of rectangle frame patch, inverted L-shaped minor matters both ends are separately connected rectangle frame patch lower side, left side, T shape The right edge of minor matters one end connection rectangle frame patch.

6. the miniaturization low section broadband beam antenna according to claim 5 applied to WiFi and WiMAX, feature exist In: the rectangle frame patch is non-closed rectangle frame patch, and jagged, the monopole radiation patch is arranged in the middle part of lower side For symmetrical structure, it is made of monopole radiation patch upper and lower two rectangular patches, and the rectangular patch of upside compares downside Rectangular patch it is wide, the rectangle of downside patch lower end is located in notch.

7. the miniaturization low section broadband beam antenna according to claim 1 applied to WiFi and WiMAX, feature exist In: air layer is provided between radiation patch, reflector patch.

8. the miniaturization low section broadband beam antenna according to claim 2 applied to WiFi and WiMAX, feature exist In: radiation patch is printed on the upper surface of first medium substrate, and reflector patch is printed on the lower surface of second medium substrate.

9. the miniaturization low section broadband beam antenna according to claim 8 applied to WiFi and WiMAX, feature exist In: air layer is provided between first medium substrate and second medium substrate.