CN-122000704-A - Indoor ultra-wideband transparent directional antenna

CN122000704ACN 122000704 ACN122000704 ACN 122000704ACN-122000704-A

Abstract

The invention provides an indoor ultra-wideband transparent directional antenna which comprises a transparent outer cover, a transparent bottom plate, a base, a first diamond array and a second diamond array, wherein the first diamond array and the second diamond array comprise four transparent vibrators which are arranged in a diamond mode, the first diamond array is connected with a first feed network, and the second diamond array is connected with a second feed network. The diamond array can maximize the diagonal distance between the cells, which is critical for suppressing grating lobes of the antenna, especially grating lobe suppression at the high frequency end. Grating lobes can cause energy to radiate in unwanted directions, reducing antenna gain and efficiency. Four transparent vibrator diamond arrays achieve a good balance between performance, flexibility and complexity, and cost.

Inventors

CHEN XIAOKUI
Xu Yuansi
JIANG YINGHAO
Lin Zhuoyue
LI SIBO
ZHU JIA
TIAN YANHAO
GUO CHENMING
BI MENG
HOU YANZHUANG
WU DI
Lv Zhengchun
LIU XIAOGANG

Assignees

中国铁塔股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260122

Claims (10)

1. The indoor ultra-wideband transparent directional antenna is characterized by comprising a transparent outer cover (1), a transparent bottom plate (8), a base (2), a first diamond array (14) and a second diamond array (15), wherein the base (2) is arranged at the bottom of the transparent outer cover (1), the transparent bottom plate (8) is arranged at the base (2) and is positioned inside the transparent outer cover (1), the first diamond array (14) and the second diamond array (15) are arranged at the transparent bottom plate (8), the first diamond array (14) and the second diamond array (15) comprise four transparent vibrators (6), the four transparent vibrators (6) are arranged in a diamond mode, the transparent bottom plate (8) is provided with two feed networks, namely a first feed network and a second feed network, the first feed network (14) is connected with the first feed network, the second diamond array (15) is connected with the second feed network, the first diamond array (14) and the second feed network are connected with the second feed network, and the first feed network and the second network are connected with the base (2) through a waterproof feed network joint (5), and the waterproof feed network is provided with the base (2).
2. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, The centers of the first diamond array (14) and the second diamond array (15) are on a horizontal line, and the distance between the centers is 2.5-3; the first diamond-shaped array (14) comprises four guide sheets (7), and the four guide sheets (7) are fixed on the four transparent vibrators (6) of the first diamond-shaped array (14) in a one-to-one correspondence manner; The second diamond-shaped array (15) comprises four guide sheets (7), and the four guide sheets (7) are fixed on the four transparent vibrators (6) of the second diamond-shaped array (15) in a one-to-one correspondence mode.
3. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, The distance between the two transparent vibrators (6) in the horizontal direction and the distance between the two transparent vibrators (6) in the vertical direction of the first diamond array (14) are equal, and the distance is 1.3-1.7 times of the center wavelength of free space; The distance between the two transparent vibrators (6) in the horizontal direction and the distance between the two transparent vibrators (6) in the vertical direction of the second diamond array (15) are equal, and the distance is 1.3-1.7 times of the center wavelength of free space.
4. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, A first isolation strip (9) and a second isolation strip (10) are respectively arranged in two diagonal directions of the first diamond array (14), the first isolation strip (9) and the second isolation strip (10) are respectively fixed on the transparent bottom plate (8), and the first isolation strip (9) and the second isolation strip (10) isolate four transparent vibrators (6) in the first diamond array (14); First isolation strips (9) and second isolation strips (10) are respectively arranged on two diagonal directions of the second diamond array (15), the first isolation strips (9) and the second isolation strips (10) are respectively fixed on the transparent bottom plate (8), and the first isolation strips (9) and the second isolation strips (10) isolate four transparent vibrators (6) in the second diamond array (15).
5. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, The periphery of the first diamond array (14) is provided with a third isolation strip (11) and a fourth isolation strip (12), the distances between the third isolation strip (11) and the center of the fourth isolation strip (12) and the center of the first diamond array (14) are all vacuum wavelengths with the center frequency of 1.5-1.7 times, and the third isolation strip (11) and the fourth isolation strip (12) are respectively fixed on the transparent bottom plate (8); The periphery of the second diamond array (15) is provided with a third isolation strip (11) and a fourth isolation strip (12), the distance between the third isolation strip (11) and the center of the fourth isolation strip (12) and the center of the second diamond array (15) is the vacuum wavelength with the center frequency of 1.5-1.7 times, and the third isolation strip (11) and the fourth isolation strip (12) are respectively fixed on the transparent bottom plate (8).
6. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, Every transparent oscillator (6) include oscillator radiation face (17), first feed piece (18) and second feed piece (19), first feed piece (18) all open the open slot on second feed piece (19), first feed piece (18) with inlay into mutually perpendicular's structure through the open slot between second feed piece (19), first feed piece (18) with the upper end of second feed piece (19) all peg graft in on oscillator radiation face (17), first feed piece (18) with the lower extreme of second feed piece (19) all peg graft and are fixed in on transparent bottom plate (8), every transparent oscillator (6) all with corresponding on the front of transparent bottom plate (8) feed network (13) with the ground plane of the bottom surface of transparent bottom plate (8) is connected.
7. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, The circuit of the first feed network is set to be a one-to-four cascade connection and comprises a primary one-to-two and two secondary one-to-two, wherein the secondary one-to-two is divided into two more parts of each output end of the primary one-to-two, each secondary one-to-two is respectively connected with two transparent vibrators (6) of the first diamond array (14), one secondary one-to-two is connected with two transparent vibrators (6) of the upper left corner of the first diamond array (14), and the other secondary one-to-two is connected with two transparent vibrators (6) of the upper right corner of the first diamond array (14); The circuit of the second feed network is set to be a one-to-four cascade connection and comprises a primary one-to-two and two secondary one-to-two, wherein the secondary one-to-two is divided into two more parts of each output end of the primary one-to-two, each secondary one-to-two is respectively connected with two transparent vibrators (6) of the second diamond array (15), one secondary one-to-two is connected with two transparent vibrators (6) of the upper left corner of the second diamond array (15), and the other secondary one-to-two is connected with two transparent vibrators (6) of the upper right corner of the second diamond array (15).
8. The indoor ultra-wideband transparent directional antenna of claim 1, wherein, The indoor ultra-wideband transparent directional antenna comprises a base (2), wherein two ends of the base are respectively connected with a metal bracket (4) through an L-shaped connecting plate (3), the angle of the indoor ultra-wideband transparent directional antenna in the pitching direction is adjusted through rotating the L-shaped connecting plate (3), a plurality of holes are formed in the bottom of the metal bracket (4), one hole is a central hole, the metal bracket (4) is rotatably arranged on a mounting frame (16), the indoor ultra-wideband transparent directional antenna horizontally rotates around the mounting frame (16) by taking the central hole as the center, two holes, which are close to the central hole, on the left side and the right side are rotary holes, and the position of the indoor ultra-wideband transparent directional antenna in the horizontal direction is adjusted through the rotary holes.
9. The indoor ultra-wideband transparent directional antenna of claim 2, wherein, The transparent vibrator (6), the transparent bottom plate (8), the transparent outer cover (1) and the guide piece (7) are made of light-transmitting PC; transparent oscillator (6) transparent bottom plate (8) transparent dustcoat (1) all be equipped with transparent conductive film on guiding piece (7), transparent conductive film's substrate is pet, transparent conductive film's conducting layer is copper, transparent conductive film adopts the metal mesh mode.
10. The indoor ultra-wideband transparent directional antenna as in claim 1, characterized in that the working frequency band of the feed network (13) on the transparent vibrator (6) and the transparent bottom plate (8) is 1700-3700MHz.

Description

Indoor ultra-wideband transparent directional antenna Technical Field The invention relates to the technical field of communication antennas, in particular to an indoor ultra-wideband transparent directional antenna. Background The transparent antenna has great superiority for high-end application scenes, has the characteristics of high transparency, excellent performance and flexible installation, has great significance for solving deep coverage, but has narrower frequency band and insufficient sharing capability, can realize relatively larger working bandwidth (supporting 700-2700 MHz) when applied to a transparent ceiling antenna of indoor distribution scenes, and can not support sharing of multiple operators when applied to a transparent wide-angle antenna and an indoor transparent directional antenna of a high-rise coverage scene, wherein the working bandwidth is narrower (supporting 1700-2700MHz or 3300-3700 MHz). The current transparent antenna has higher price, and the transparent antenna core component relates to transparent base material and transparent conductive film processing, wherein the processing cost of the transparent conductive film accounts for 60% -80% of the core component cost. The price of the opposite-to-driving transparent antenna of the building is 2.5-5 times of that of the common spotlight antenna, the price of the opposite-to-driving transparent antenna of the building is 20% higher than that of the novel building, and the price of the transparent ceiling antenna is 12-46 times of that of the common ceiling antenna. The vast majority of the narrow-band transparent antenna elements are in the form of transparent microstrip patches, and signals are transmitted to the radiation patches from the feeder lines in the form of coupling feed through no direct contact, so that radiation is generated. At present, the transparency of the conductive layer is realized by the following schemes which are widely used, namely (1) a metal grid, (2) silver nanowires, (3) indium tin oxide and (4) metal ink. The metal grid works on the principle that extremely fine metal (usually copper or silver) wires are made into grid patterns, which are lower than the resolution of human eyes, so that a transparent effect is realized. The grid voids allow light to pass through and the metal lines provide conductive paths. The silver nanowire is characterized in that the silver nanowire with the diameter of 20-50 nanometers and the length of 20-50 micrometers is coated into a random network. Light is transmitted through the interstices between the nanowires, while the random network structure provides a communicating conductive path. The indium tin oxide working principle is that an n-type semiconductor material is deposited on a substrate through vacuum processes such as magnetron sputtering and the like to form a layer of conductive and transparent film. The working principle of the metal ink is that metal nano particles (mainly silver) are dispersed in a solvent to form ink, the ink is printed on a substrate through patterning processes such as screen printing, ink-jet printing and the like, and a conductive layer is formed after low-temperature sintering. In the prior art, CN119208975 discloses a directional transparent antenna, which relates to the technical field of communication, and comprises a transparent outer cover, wherein one end, far away from a base, of an L-shaped mounting bracket is jointly connected and provided with the mounting bracket, the front end face of an inner cavity of the transparent outer cover is sequentially provided with transparent vibrators from left to right, the bottom of the inner cavity of the base is provided with a power division plate, the center of the bottom of the base is provided with two groups of radio frequency cable assemblies, transparent antenna films are arranged on the transparent vibrators and the transparent reflection plate, the transparent antenna films are made of PET materials with low sheet resistance, a metal layer is adhered on the films, the metal layer adopts a metal grid mode, the performance of the transparent antenna films is consistent with that of a traditional copper foil or a metal surface, shading can be effectively reduced, the transmittance of the whole vibrator is more than 80%, the working frequency range is 1690-2690MHz, any frequency range in 698-960,3300-4200 can be matched according to the frequency range adjustment size, the large bracket can be rotated as required through the mounting bracket and the base is fixedly connected. The invention discloses a broadband transparent oscillator, which relates to the technical field of communication and comprises a bottom plate, wherein a balun is arranged at the center of the top of the bottom plate, two groups of oscillator pieces are arranged at the top of the balun in a cross shape, supporting columns are arranged at the two ends of the top of each of the two groups of oscillator pieces