Structure of planar dual-polarization antenna

Planar dual-polarized antenna structure

The present invention relates to a planar dual-polarized antenna structure, in particular to a planar dual-polarized antenna structure for a multiple input multiple output (MIMO) system; the main structural feature is to provide a dipole antenna and a circuit on a printed circuit board. A loop antenna, and the dipole antenna and the loop antenna are parallel to each other.

According to the multi-input multi-output orthogonal frequency division multiplexing (MIMO OFDM), it has been the mainstream application of wireless communication systems. The antenna currently applied to a multiple input multiple output (MIMO) wireless communication system is a planar double dipole antenna. Referring to the first figure, the first dipole antenna 101 of the conventional double dipole antenna is used. The dipole antenna 102 is disposed on a printed circuit board (PCB) 103, and the first and second dipole antennas 101, 102 are arranged in a T-shape perpendicular to each other.

Although the conventional dual Dipole antenna can achieve the purpose of multiple input multiple output (MIMO) communication, the disadvantages are: (a) the first and second dipole antennas 101, 102 are perpendicular to each other and placed in the printed circuit. The area of the board (PCB) 103 forming the antenna is about 50 mm × 50 mm, and the area is too large, which is disadvantageous for the miniaturization of the antenna.

(a) The gain value (Gain) in the 2.45 MHz band is not good. Referring to the second figure, the S-parameter intensity map measured by the conventional dual Dipole antenna in the 2.45 MHz band, the gain value (Gain) of the first dipole antenna 101 is only 2.4 dBi, and the second dipole antenna 102 The gain value (Gain) is only 1.9 dBi.

<p>The present invention aims to solve the disadvantages of the large size of the dual Dipole antenna, which is disadvantageous to miniaturization and poor gain value, and achieves reduction in antenna area, miniaturization, and improvement of gain value.</p>

<p>The present invention is a planar dual-polarized antenna structure, which is provided with a dipole antenna and a loop antenna on a printed circuit board, wherein the dipole antenna and the loop antenna are parallel to each other.</p>

<p>The present invention has a planar dual-polarized antenna structure, and its main purpose is that the dipole antenna and the loop antenna are parallel to each other, effectively reducing the area occupied by the antenna, and achieving the effect of miniaturizing the antenna.</p><p>The second purpose of this creation is that the dipole antenna and the loop antenna each input a signal to excite different polarizations, thereby achieving the effects of signal divergence and wide bandwidth.</p><p>Another purpose of this creation is to increase the radiation transceiving gain value of the dipole antenna and the loop antenna.</p>

In order to be able to disclose the purpose, features and effects of the present invention in detail, the following detailed description of the preferred embodiment, together with the accompanying drawings, provides a detailed description of the creation as follows: as shown in the third figure, A combined dual-polarized antenna structure includes a dipole antenna 10, a loop antenna 20, and a printed circuit board 30; wherein the dipole antenna 10 and the loop antenna 20 The common arrangement is placed on the printed circuit board 30, and the dipole antenna 10 and the loop antenna 20 are parallel to each other.

By arranging the dipole antenna 10 and the loop antenna 20 in parallel with each other, the area occupied by the antenna is effectively reduced, and the effect of miniaturizing the antenna is achieved.

At the same time, the dipole antenna 10 and the loop antenna 20 respectively input signals to excite different polarizations, thereby achieving the effects of signal divergence and wide bandwidth.

Referring to the reflection loss map and the voltage standing wave ratio diagram measured by the dipole antenna 10 of the present embodiment in the 2.45 MHz band, the radiation transmission gain value (Gain) of the dipole antenna 10 is increased to 4.0 dBi; Fig. 5 is a graph showing a reflection loss map and a voltage standing wave ratio measured by the loop antenna 20 of the present embodiment in the 2.45 MHz band, showing that the radiation transmission gain value (Gain) of the loop antenna 20 is increased to 5.0 dBi.

As described in the above specific embodiment, the structure of the planar dual-polarized antenna structure of the present invention has practical effects, and is a new design that has never been seen before, and has the efficacy and progress, so it has met the new patent legal requirements, and Application for the text. To this end, I would like to examine the review committee in detail, and pray for the grant of patents as soon as possible.

The present invention has been described in detail above, but the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited. That is, all changes and modifications made in accordance with the scope of this creation application shall remain within the scope of this creation patent.

<p>10. . . Dipole antenna</p><p>20. . . Loop antenna</p><p>30. . . Printed circuit board (PCB)</p><p>101. . . First dipole antenna</p><p>102. . . Second dipole antenna</p><p>103. . . Printed circuit board (PCB)</p>

The first figure is a combined structure diagram of a conventional double Dipole antenna; the second picture is an S-parameter intensity map measured by a conventional double dipole antenna in the 2.45 MHz band; The figure is a combined structure diagram of the present embodiment; the fourth figure is the reflection loss map and the voltage standing wave ratio diagram of the dipole antenna in the 2.45 MHz band of the present embodiment; the fifth figure is the creation embodiment of the present invention. The reflection loss map and the voltage standing wave ratio map measured by the loop antenna in the 2.45 MHz band.