KR0124798B1 - Planar antenna for mobile comm. station - Google Patents

Abstract

Disclosed is plane antenna for a mobile communication station which can solve the problem of a conventional antenna of a mobile communication station by using micro-strip antenna. The plane antenna is easily installed and has a wide frequency band. The plane antenna is comprised of an antenna, a feeder and a radom(3). The antenna includes a conductor wave radiator(1), a parasitic element(2), an insulator(4), and a reflection plate(5). The strip line of the feeder extends from the antenna to conductors(7 and 8) through reflection plate(5) and insulator(4). According to the location of the antenna, the feeder can be directly connected to a cable. Radom(3) can protect the antenna from an external shock. The antenna can be easily installed and the weight thereof is reduced so that the antenna can be easily handled.

Description

Planar antenna for mobile communication base station

1A is a plan view of a planar antenna of the present invention.

1B is a side view of the antenna of FIG. 1A.

FIG. 2A is a plan view in which two antennas of FIG. 1A are arranged vertically. FIG.

2B is a side view of the antenna of FIG. 2A.

3A is a plan view in which the antenna of FIG. 1A is vertically arranged in four stages.

3B is a plan view in which the antenna of FIG. 1A is vertically arranged in eight stages.

4 is a plan view of a planar array antenna having a total of n × m stages by arranging the antennas of FIG.

* Explanation of symbols for the main parts of the drawings

1: conductor spreader 2: parasitic element

3: Radom 4,6: insulator

5: Conductor reflector 7,8: Air stripline conductor

T ₁ , T ₂ : Feeding connector P: Feeding point of copier.

This antenna is composed of VHF, UHF, microwave frequency band as a microstrip antenna, and is attached to the wall of a building. When installing the conventional mobile communication base station antenna and VHF, UHF, microwave frequency band antenna is required a special structure, such as a pylon, heavy, there is a disadvantage in the installation, as well as a disadvantage to affect the surrounding environment. Therefore, the microstrip antenna is used to make it light, easy to install, and well matched with the existing environment. By the way, the microstrip antenna is also easy to manufacture and install in a flat and cylindrical, but has a disadvantage of narrow bandwidth. Accordingly, an object of the present invention is to solve the above problems by increasing the bandwidth of the microstrip antenna.

In the structure of this antenna, an insulator 4 is attached to the front surface of the conductor reflector 5 in FIG. 1A, and a conductor propagation copier 1 and a parasitic element 2 are attached thereon, and a high frequency is applied to the feed point P. By devising a microstrip antenna for feeding the parasitic element 2 around the conductor propagation copier 1, the frequency band was widened. In addition, the feed section of the antenna forms a strip line with an insulator 6, conductor plates 7 and 8 on the rear surface of the conductor reflector 5, and the antenna feed point P and the connector T with this strip line feed line. ₁ ) Connect and transmit / receive by connecting the transmit / receive cable to the connector (T ₁ ). If not attached to the wall, the connector may be attached directly behind the feed point (P).

Since this antenna is installed outdoors, the radom (3) was used to prevent moisture. Insulators (4) and (6) using air strips were used to increase the efficiency of the antenna used for high power and to prevent burnout at high power.

FIG. 2A shows the antenna arrayed in two vertical stages according to FIG. 1A, coupled with a stripline or coaxial cable as a feeder, and fed to the connector T ₂ to increase the gain more than two times. FIG. However, the gain is about 4 times or more, and FIG. 3B is a vertical 8-stage synthesis to increase the gain by about 8 times or more. The horizontal copy pattern is almost the same as the first or eight levels, but the vertical copy pattern has the pressed points according to the arrangement. To prevent this, the phase difference is configured differently at each stage, and the dead zone is eliminated by pressing wheel. Further, in order to further increase the gain, n × m antennas are synthesized by n stages vertically and m stages horizontally as in the fourth diagram to increase the gain and narrow the radiation beam.

For example, if the antenna gain of FIG. 1 is 5 dBi, the gain of 17 dBi or more may be increased by performing two vertical and eight horizontal columns.

As described above, according to the present invention, it is possible to install in the surrounding walls of the building without the need for a special support structure for the antenna installation, and to kill the economic loss caused by the support structure, the weight of the antenna is easy to handle, and the environment and well You can hang out. In addition, as shown in FIG. 1A, the parasitic element 2 may be attached not only to the left and right but also to the upper and lower sides, and the gain and the bandwidth may be increased by using the parasitic element 2 and the air strip.

Claims (1)

As shown in FIG. 1A and the above detailed description, the insulator 4 is attached to the front surface of the conductor reflector 5, the conductor radiator 1 is installed thereon, and the parasitic element 2 is placed on the front surface of the conductor radiator 1. 1 to 5 elements widen the pass frequency bandwidth, double the gain, and use the antenna feeder as a stripline consisting of the conductor reflector 5, the insulator 6 and the conductors 7, 8 or coaxial cable directly. A planar antenna device for a mobile communication base station with a parasitic element (2) characterized by being fed at point (P).