CN203288747U - A UWB Printed Monopole Antenna - Google Patents

Abstract

The utility model discloses an ultra-broadband printed monopole antenna, which can be applied in wireless communication systems. The antenna is composed of a dielectric substrate, a radiation patch, a microstrip feeder, and a ground plane. The radiation patch is connected to the microstrip feeder and the ground plate is printed on both sides of the dielectric substrate, and a rectangular groove is engraved above the middle of the ground plane. The working bandwidth of the ultra-broadband antenna of the utility model is adjustable, the passband matching characteristic is good, the volume is small, and the manufacture is simple and convenient.

Description

A UWB Printed Monopole Antenna

technical field

The utility model belongs to the field of antennas, in particular to a small ultra-broadband printed monopole antenna.

Background technique

Since January 14, 2002, the US Federal Communications Commission classified the 3.1-10.6GHz frequency band as a civilian license-free ultra-wideband frequency band, ultra-wideband short-distance communication technology has become the focus of fierce competition in the field of wireless communications. The ultra-wideband antenna, which is an important part, has also become a hot topic for scientific and technological personnel to study in recent years.

Utility model content

The ultra-broadband antenna of the utility model adopts a rounded rectangular radiation patch, and opening a rectangular slot on the ground surface can achieve the purpose of optimizing the impedance bandwidth. By adjusting the size of the rectangular slot, the characteristic impedance of the microstrip line can also be adjusted, thereby achieving widened frequency belt purpose.

The utility model adopts the following technical solutions:

The utility model ultra-wideband antenna includes a dielectric substrate, a radiation patch, a microstrip feeder, and a ground plane, and is characterized in that: the front of the dielectric substrate is printed with a radiation patch and a microstrip feeder, and the microstrip feeder and the radiation patch The sheets are connected, and the back of the dielectric substrate is printed with a ground plane and has a rectangular groove. The radiation patch is a rounded rectangle and is located above the dielectric substrate; the rectangular groove is engraved above the ground plane on the back of the dielectric substrate and directly below the microstrip feeder.

Compared with the prior art, the utility model has the following significant advantages:

1. Adjustable passband bandwidth: This utility model adopts a rounded rectangular patch, which is convenient for design and adjustment. By changing the radius of the circle and the length and width of the rectangle, the working bandwidth of the ultra-wideband antenna can be adjusted.

2. Small volume: the utility model has simple structure, convenient manufacture and small volume.

Description of drawings

Fig. 1 is a front view of the ultra-wideband printed monopole antenna of the present invention.

Fig. 2 is a back view of the ultra-wideband printed monopole antenna of the present invention.

Fig. 3 is a return loss curve diagram of the ultra-wideband printed monopole antenna of the present invention.

Fig. 4 is a graph of the voltage standing wave ratio of the ultra-wideband printed monopole antenna of the present invention.

Fig. 5 is the radiation pattern of the ultra-broadband printed monopole antenna of the present invention at 3 GHz.

Fig. 6 is the radiation pattern of the ultra-broadband printed monopole antenna of the present invention at 7 GHz.

Fig. 7 is the radiation pattern of the ultra-broadband printed monopole antenna of the present invention at 11 GHz.

Fig. 8 is the radiation pattern of the ultra-broadband printed monopole antenna of the present invention at 15 GHz.

Detailed ways

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

As shown in Figure 1 and Figure 2, the radiation patch 2 is located above the front of the dielectric substrate 1, the microstrip feeder 3 is located below the front of the dielectric substrate 1, and the radiation patch 2 and the microstrip feeder 3 are located in the center of the dielectric substrate 1 , showing a left-right symmetrical structure, the ground plane 4 is located below the back of the dielectric substrate 1, and the rectangular slot 5 is opened on the ground plane 4 and located directly below the microstrip feeder, and the ground plane and the rectangular slot are left-right symmetrical structures.

Referring to Figure 1 and Figure 2, label 1 is a dielectric substrate, its material is polytetrafluoroethylene (FR-4), its dielectric constant is 4.4, and its length, width, and thickness are 40mm×27mm×1.6mm; 2 is a rounded rectangular radiation patch, the length and width of the rectangle are both 14mm, and the rounded corners with a radius of 4mm are cut off on it; the number 3 is a microstrip feeder, and its length and width are 14mm×2.9mm; The ground has a length and width of 27mm×12.5mm; number 5 is a rectangular slot opened on the ground surface, and its length and width are 3mm×2.9mm.

Fig. 3 is the return loss curve figure of present embodiment, as can be seen from Fig. 3 this antenna is less than-10dB in 3-16GHz frequency band return loss, and Fig. 4 is the voltage standing wave ratio curve figure of present embodiment, from figure 4, it can be seen that the standing wave ratio of this antenna is less than 2 in the 3-16GHz frequency band.

Figures 5, 6, 7, and 8 are the directional diagrams of the antenna of this embodiment at 3GHz, 7GHz, 11GHz, and 15GHz respectively. It can be seen from the figure that this embodiment has good directivity in the entire frequency band, satisfying Design requirements.

The above example is a preferred implementation mode of the present invention. In addition, on the basis of this embodiment, changing the size of the radiation patch, fillet radius, microstrip feeder and ground plane; changing the size of the rectangular slot should be included in this within the scope of protection of utility models.

Claims (3)

1. a kind of ultra-broadband printed monopole antenna, its composition comprises dielectric substrate, radiation patch, microstrip feeder, ground plane, it is characterized in that: described dielectric substrate front is printed with radiation patch and microstrip feeder, so The microstrip feeder described above is connected to the radiation patch, and a ground plane is printed on the back of the dielectric substrate, and a rectangular slot is opened. 2. The ultra-broadband printed monopole antenna according to claim 1, characterized in that: the radiation patch is a rounded rectangular structure, and the radiation patch is located above the dielectric substrate. 3. The ultra-broadband printed monopole antenna according to claim 1, characterized in that: said rectangular groove is engraved above the ground plane on the back of the dielectric substrate and directly below the microstrip feeder.

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