CN206134932U - An UWB Antenna Combining Wire and Surface - Google Patents

Abstract

The utility model discloses an ultra -wideband antenna of line face bonding, including base plate, radiation paster and plane ground, the setting of radiation paster is in the front of base plate, and plane ground sets up the back at the base plate, the radiation paster includes the primary radiation body and feeder transport line, and the feeder transport line sets up in the below of the primary radiation body, and the primary radiation is internal to be equipped with one and to fall " T " shape irradiator, and the feeder transport line sets up in the below of radiating the paster, " T " shape open slot is equipped with down on the plane on the ground, the partly face structure that is of radiation paster, all the other parts are constructed for line knot, the utility model discloses it is small, simple structure, it is with low costs, and antenna gain is high.

Description

An UWB Antenna Combining Wire and Surface

technical field

The utility model belongs to the technical field of antennas, in particular to an ultra-wideband antenna combined with lines and surfaces.

Background technique

The rapid development of wireless communication technology makes the existing spectrum resources increasingly tight, and puts forward higher and higher requirements for the system capacity and transmission rate of wireless communication. Ultra-wideband technology has attracted people's attention due to its low power consumption, high data transmission rate, high resolution, low cost, strong anti-interference ability, good confidentiality and coexistence with other narrowband communication systems. The U.S. Federal Communications Commission (FCC) approved in February 2002 that the commercial frequency band of the ultra-wideband (UWB) system is 3.1-10.6 GHz. Compared with traditional antennas, UWB antenna design faces more challenges. Traditional broadband antennas cannot transmit UWB signals without distortion. At present, common UWB antennas such as helical antennas, log-periodic antennas, TEM horn antennas, and Vivaldi antennas have problems such as large volume, complex structure, difficulty in implementation, and miniaturized system integration. .

Utility model content

Aiming at the problems existing in the existing technology, we designed a planar ultra-wideband antenna with a size of only 18mm×12mm×1.6mm, which is small in size, simple in structure, easy to process, low in cost and good in performance. The antenna structure we designed is relatively novel. There is a T-shaped structure in the middle of the front radiation patch, and an inverted T open slot is cut on the back reference ground. These structural features can increase the bandwidth of the antenna. Since the current on the surface of the radiation patch is mainly concentrated on the edges around the radiation patch, and the current in the middle of the patch is very small, so finally part or all of the radiation patch on the front of the antenna is kept, and only the edge of the radiation patch is kept. Edge-to-line structure. Doing so can not only reduce the cost, but also ensure the original radiation performance of the antenna. Make the -6dB working frequency band of the antenna in 2.37GHz-2.8GHz and 3.6GHz-12GHz

The utility model provides a planar ultra-wideband antenna which is simple in structure, easy to process, low in cost and good in performance and combines lines and surfaces.

The technical scheme adopted in the utility model is as follows:

A line-surface combined ultra-wideband antenna includes a substrate, a radiation patch, and a plane ground; the radiation patch is arranged on the front of the substrate, and is arranged on the back of the substrate planarly; the radiation patch includes a main radiator and Feed transmission line, the feed transmission line is set under the main radiator, an inverted "T" shaped radiator is arranged in the main radiator, and the feed transmission line is set under the radiation patch; an inverted "T" shaped opening is set on the flat ground Grooves; a part of the radiation patch is a planar structure, and the rest is a line structure.

Further, the main radiator and the feeder transmission line are connected by a smooth curved connection structure.

Further, the smooth curved connection structure is two sections of 90-degree arcs that are tangent at the connection point, and the radius of the arc is 2mm.

Further, the length of the substrate is 18mm, the width is 12mm, and the thickness is 1.6mm.

Further, the main radiator part of the radiation patch is a line structure, and the rest is a plane structure.

Further, the radiation patch is integrally formed.

The beneficial effects of the utility model include the following points:

The size of the antenna unit is very small, only 18mm×12mm×1.6mm, and the height is 1.6mm of the thickness of the dielectric plate (ie, the substrate). It has small volume, simple structure, low cost and high antenna gain.

Moreover, the working frequency band of the antenna is 2.37GHz-2.8GHz and 3.6GHz-12GHz. The antenna system has a wide range of uses and can meet the applications of WLAN (2.45GHz), WiMAX (5.25-5.85GHz) and UWB (3.96-10.6GHz) demand.

Secondly, the wire-surface combined structure is simpler and lighter than a comprehensive antenna structure, and the space saved after linearization can be used to place rectifier circuits and matching circuits, making the entire antenna system more compact and lower in cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1a is a schematic diagram of the front structure of the comprehensive structure antenna corresponding to the utility model;

Fig. 1b is a schematic diagram of the back structure of the comprehensive structure antenna corresponding to the utility model;

Fig. 2a is a schematic diagram of the structure of the ultra-wideband antenna combined with line and surface of the present invention after removing the substrate;

Fig. 2b is a structural schematic view of the full-wire structure antenna corresponding to the present invention after removing the substrate;

Fig. 3 is the return loss diagram of the comprehensive antenna;

Fig. 4a is the return loss diagram of the ultra-wideband antenna combined with line and surface in Fig. 2a of the present invention;

Fig. 4b is a return loss diagram of the full-line structure antenna corresponding to Fig. 2b of the present invention;

Fig. 5 a is the z parameter diagram of the simulation of the comprehensive structure antenna corresponding to the utility model;

Fig. 5 b is the z-parameter diagram of the simulation of the full-line structure antenna corresponding to the utility model;

Fig. 5c is the z-parameter diagram of the simulation of the ultra-wideband antenna combined with line and surface of the present invention;

Fig. 6a is the gain diagram of the XZ surface when the bandwidth of the utility model is 2.45GHz;

Fig. 6b is the gain diagram of the YZ plane when the bandwidth of the utility model is 2.45GHz;

Fig. 7a is the gain diagram of the XZ surface when the bandwidth of the utility model is 5 GHz;

Fig. 7b is a gain diagram of the YZ plane when the bandwidth of the utility model is 5 GHz.

detailed description

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.

As shown in Figures 1a-7b, a line-surface combined ultra-wideband antenna includes a substrate 1, a radiation patch 2, and a plane ground 4; the radiation patch 2 is arranged on the front of the substrate, and the plane ground 4 is arranged on the The back side of the substrate; the radiation patch 2 includes a main radiator 3 and a feeding transmission line 5, the feeding transmission line 5 is arranged below the main radiator 3, and an inverted "T" shaped radiator 6 is arranged in the main radiator 3, The feeding transmission line 5 is arranged below the radiation patch 2; an inverted "T"-shaped opening slot 7 is provided on the plane ground 4, which can increase the capacitance between the radiation patch 2 and the ground; a part of the radiation patch 2 is surface structure, and the rest are wire structures, which can still maintain the original radiation performance while reducing the weight of the antenna and saving space (the current on the surface of the radiation sheet is mainly concentrated on the edge contour of the radiation sheet, and the current in the middle of the patch very little current).

The main radiator 3 and the feeding transmission line 5 are connected by a smooth curved connection structure (that is, the outer contour of the connection structure is a smooth curve). degree arc, the radius R of the arc is 2mm, such a structure can achieve a relatively wide bandwidth.

The substrate 1 adopts an FR4 material substrate with a length L6 of 18 mm, a width W6 of 12 mm, and a thickness of 1.6 mm. The lateral width W1 of the main radiator 3 is 10 mm, and the vertical length L1 is 9 mm. The frame width W2 is 8mm, and the length L2 is 8mm; the length L4 of the vertical section of the inverted "T"-shaped radiator 6 in the main radiator 3 is 6.1mm, and the side of the vertical section to the main radiator on the same side The distance W4 of the inner frame of 3 is 2.5mm; the length L5 of the horizontal section of the inverted "T"-shaped radiator 6 is 1.7mm, and the distance W5 between its two ends and the inner frame of the main radiator 3 on the same side is 0.2mm; The length L3 of the electrical transmission line 5 is 4 mm, and its width W3 is 2 mm. The width of the flat ground 4 at the back of the substrate 1 is the same as the width of the substrate 1, and its length L7 is 3mm. The horizontal section width of the inverted "T" shape opening groove 7 on it is 5mm for W8, and the horizontal section length L9 is 0.5mm, the width W7 of the vertical section is 2mm, and the length L8 is 1mm.

This design reduces the volume of the antenna and at the same time enables the antenna to have a wider bandwidth and ensures the radiation intensity of the antenna.

As shown in Fig. 2a, the main radiator 3 of the radiation patch 2 has a line structure, and the rest has a planar structure. It can be seen from the comparison of Figure 4a and Figure 4b that the -6dB bandwidths of the two antennas are respectively, Figure 4a: 2.37GHz-2.8GHz and 3.6GHz-12GHz, Figure 4b: 2.37GHz-9.57GHz. In contrast, the antenna of the present utility model shown in Fig. 4a has better performance and a wider application range, meeting the requirements of WLAN (2.45GHz), WiMAX (5.25-5.85GHz) and UWB (3.96-10.6GHz) applications.

The above is only the specific implementation of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative labor should be covered within the scope of protection of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope defined in the claims.

Claims (6)

1. A line-surface combined ultra-wideband antenna, characterized in that it includes a substrate (1), a radiation patch (2), and a plane ground (4); the radiation patch (2) is arranged on the front surface of the substrate, The plane ground (4) is arranged on the back of the substrate; the radiation patch (2) includes a main radiator (3) and a feeding transmission line (5), and the feeding transmission line (5) is arranged under the main radiator (3) , the main radiator (3) is provided with an inverted "T"-shaped radiator (6), and the feeder transmission line (5) is arranged under the radiation patch (2); an inverted "T" is arranged on the plane ground (4). ”-shaped opening groove (7); a part of the radiation patch (2) is a surface structure, and the rest is a line structure. 2. The ultra-wideband antenna combined with line and surface according to claim 1, characterized in that: the main radiator (3) and the feeding transmission line (5) are connected by a smooth curved connection structure. 3. A line-surface combined ultra-wideband antenna according to claim 2, characterized in that: the smooth curved connection structure is two 90-degree arcs that are tangent at the connection point, and the radius of the arc is 2mm. 4. The ultra-broadband antenna combined with wire and surface according to claim 1, characterized in that: the length of the substrate (1) is 18 mm, the width is 12 mm, and the thickness is 1.6 mm. 5. The ultra-broadband antenna combined with line and surface according to claim 1, characterized in that: the main radiator (3) part of the radiation patch (2) is a line structure, and the rest is a plane structure. 6. The ultra-broadband antenna combined with wire and plane according to claim 1, characterized in that: the radiation patch (2) is integrally formed.