TWM584026U - Communication antenna array structure - Google Patents

Abstract

The communication antenna array structure of the present invention comprises: an antenna array and a feed network combined with the antenna array, the antenna unit having at least one first antenna radiation electrode and at least one second antenna radiation overlapping at least one another An electrode for increasing the antenna bandwidth; and a feed network comprising a first ceramic substrate, a second ceramic substrate and a third ceramic substrate, wherein the first ceramic substrate is provided with a cavity structure corresponding to the antenna unit, the cavity structure provides an air medium to increase the antenna gain and the bandwidth; the second ceramic substrate is provided with at least one slot corresponding to the cavity structure for transmitting a signal through the slot In the electromagnetic coupling mode, the first antenna radiation electrode and the second antenna radiation electrode are excited to transmit energy, and the top surface and the bottom surface of the third ceramic substrate are respectively provided with a phase matching network and a second ground. An electrode, the phase matching network is used to provide the magnitude and phase of the excitation current required for the antenna array.

Description

Communication antenna array structure

This creation relates to a panel antenna for a communication device, and more particularly to a millimeter wave antenna array.

Please refer to the first figure, which is a basic structure of a conventional patch antenna, which comprises a ceramic body A, a radiation metal sheet B, and a ground metal sheet C. The ceramic body A of the prior art is a dielectric material, and the radiation metal sheet B and the ground metal sheet C are formed on the lower surface of the ceramic body A without being limited to a printing technique, and the radiation metal sheet B has a resonant length of about two. One wavelength, which in turn produces a resonant frequency to receive the transmitted signal energy.

Since the wavelength of the millimeter wave is very short, the loss of signal propagation is very fast. In order to increase the communication quality and distance, it is necessary to improve the antenna gain and the path loss of the feed network. It is known from the reference that the use of high dielectric ceramic materials will lower the plate. Antenna gain and bandwidth, while the commonly used glass fiber material (FR4) has the advantage of low cost, and its low dielectric property helps to improve the antenna bandwidth and gain, but the propagation loss is very large and is not suitable for millimeter wave feeding. Network application.

In view of this, how to eliminate the above-mentioned deficiencies is the technical difficulty point that the creators of this case want to solve; however, the creators of this case are based on years of experience in relevant industries, and after many years of painstaking research, trial improvement, finally Successfully developed and completed the case, and enabled the new model to be born to enhance the efficacy.

In order to improve the above disadvantages, the present invention proposes an improved method for improving the disadvantages of using a single substrate by combining two substrates of different material properties. The communication antenna array structure of the present invention comprises: an antenna array and a feed network combined with the antenna array, the antenna unit having at least one first antenna radiation electrode and at least one second antenna radiation overlapping at least one another An electrode for increasing the antenna bandwidth; and a feed network comprising a first ceramic substrate, a second ceramic substrate and a third ceramic substrate, wherein the first ceramic substrate is provided with a cavity structure corresponding to the antenna unit, the cavity structure provides an air medium to increase the antenna gain and the bandwidth; the second ceramic substrate is provided with at least one slot corresponding to the cavity structure for transmitting a signal through the slot In the electromagnetic coupling mode, the first antenna radiation electrode and the second antenna radiation electrode are excited to transmit energy, and the top surface and the bottom surface of the third ceramic substrate are respectively provided with a phase matching network and a second ground. An electrode, the phase matching network is used to provide the magnitude and phase of the excitation current required for the antenna array.

This creation is a 2x2 antenna array, which includes 4 antenna elements (Antenna Element), which has the advantages of high directivity and high gain. The antenna unit spacing is about half wavelength. The antenna unit is a half-wavelength stacked panel antenna design ( Stacked Patch Antenna), its resonant cavity actually contains a low dielectric fiberglass material and a cavity structure.

The first connecting electrode and the second connecting electrode can be connected to each other by a surface bonding technology, so that two different material substrates are closely joined to form a resonant cavity required by the antenna unit of the present invention, due to the antenna The resonant cavity actually comprises a low dielectric fiberglass material and a cavity structure, so that the dielectric of a single glass fiber material in the antenna resonant cavity can be reduced, thereby increasing the antenna bandwidth and gain, which can effectively improve The shortcomings of the prior art.

The feed network uses a multilayer ceramic substrate, which uses a low-loss dielectric ceramic material, which is very suitable for high-integration and low-loss millimeter-wave circuit design. In practice, the RFIC with flip chip package can also be directly used. Mounted on a ceramic substrate, the path loss can be greatly reduced. Moreover, the ceramic material has high temperature resistant material characteristics and is also suitable for high power small base station equipment.

The phase network feeds the excitation antenna array mode, and is not limited to the Aperture Coupled Feed of the present invention, and may also adopt a Proximity Coupled Feed.

In order to facilitate the description of the contents of the present invention and the achievable functions, a specific embodiment will be described with reference to the drawings. Referring to the second figure, the novel communication antenna array structure 1 includes an antenna array 10 and a feed network. Road 20, the components are described as follows:

The antenna array 10 includes an antenna substrate 11 and at least one antenna unit 12. The bottom surface of the antenna substrate 11 is provided with at least one first connection electrode 111. The antenna unit 12 has at least one first antenna radiation electrode 121 and at least one The second antenna radiating electrode 122, the first antenna radiating electrode 121 and the second antenna radiating electrode 122 are respectively disposed on the top surface and the bottom surface of the antenna substrate 11, and are vertically overlapped to increase the antenna bandwidth.

In the present embodiment, the antenna substrate 11 is made of a glass fiber material or a flexible circuit board substrate, and the flexible circuit board substrate comprises PI (Polyamide) or LCP (Liquid Crystal Polymer).

The first antenna radiation electrode 121 and the second antenna radiation electrode 122 are combined with the antenna substrate 11 by a printed circuit technology, the first antenna radiation electrode 121 and the second antenna radiation electrode 122, and the radiation electrode thereof. The number of stacks is not limited to two, and may be one or two or more.

The feed network 20 includes a first ceramic substrate 21, a second ceramic substrate 22, and a third ceramic substrate 23.

The first ceramic substrate 21 is provided with at least one second connection electrode 211 and at least one cavity structure 212. The second connection electrode 211 is combined with the first connection electrode 111. The cavity structure 212 provides an air medium to increase the antenna gain. And the bandwidth, the antenna unit 12 corresponds to the cavity structure 212, and the shape of the cavity structure 212 is not limited to a square shape, and may be any shape.

The top surface of the second ceramic substrate 22 is coupled to the first ceramic substrate 21, and a first ground electrode 221 is disposed on the top surface of the second ceramic substrate 22. The first ground electrode 221 is provided with at least one slot 222. The signal is transmitted through the slot 222 or the proximity coupled feed, and the first antenna radiation electrode 121 and the second antenna radiation electrode 122 are excited. Radiation transfers energy, wherein the bottom surface of the cavity structure 212 corresponds to the slot 222; again, when an approximately coupled feed is employed, the slot 222 need not be provided.

Referring to the second and third figures, the top surface of the third ceramic substrate 23 is coupled to the bottom surface of the second ceramic substrate 22. The top surface and the bottom surface of the third ceramic substrate 23 are respectively provided with a phase matching network 231 and A second ground electrode 232, the bottom surface of the slot 222 corresponds to the phase matching network 231, and the phase matching network 231 is used to provide the magnitude and phase of the excitation current required by the antenna array 10.

Please refer to the fourth figure, which is a second embodiment of the communication antenna array structure 1. In the present embodiment, the main structure is the same as that of the first embodiment, so the same place will not be described again. In the figure, the number of antenna elements 12 is four, but is not limited thereto, and the second ceramic substrate 22 has a plurality of cavity structures 212 to correspond to the antenna elements 12.

Referring to FIG. 5 to FIG. 7 , respectively, the return loss simulation diagram and the antenna array field simulation diagram of the second embodiment have an antenna bandwidth (VSWR 1:2) of about 4 GHz and an antenna array gain of about 11.5 dBi. .

The detailed description above is a detailed description of one of the possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and equivalent implementations or modifications that are not departing from the spirit of the present invention should be included in the present invention. In the scope of patents.

1‧‧‧Communication antenna array structure  10‧‧‧Antenna array  11‧‧‧Antenna substrate  111‧‧‧First connecting electrode  121‧‧‧First antenna radiation electrode  122‧‧‧Second antenna radiation electrode  12‧‧‧Antenna unit  20‧‧‧Feed into the network  21‧‧‧First ceramic substrate  211‧‧‧Second connection electrode  212‧‧‧ Cavity structure  22‧‧‧Second ceramic substrate  221‧‧‧First grounding electrode  222‧‧‧ slots  23‧‧‧ Third ceramic substrate  231‧‧‧ phase matching network  232‧‧‧Second ground electrode  A‧‧‧Ceramic body  B‧‧‧radiation metal sheet  C‧‧‧grounded metal sheet  

The first figure is a stereoscopic appearance of the conventional conventional flat panel antenna.  The second figure is an exploded perspective view of the first embodiment of the present invention.  The third figure is a bottom view of the third ceramic substrate of the present invention.  The fourth figure is an exploded perspective view of a second embodiment of the present invention.  The fifth figure is a simulation diagram of the return loss of the second embodiment of the present invention.  The sixth figure is a simulation diagram of the antenna array field type of the second embodiment of the present invention.  The seventh figure is a simulation diagram of the antenna array field pattern of the sixth figure.  

Claims (8)

A communication antenna array structure includes:
An antenna array includes an antenna substrate and at least one antenna unit. The bottom surface of the antenna substrate is provided with at least one first connection electrode, and the antenna unit has at least one first antenna radiation electrode and at least one second antenna radiation electrode. The first antenna radiation electrode and the second antenna radiation electrode are respectively disposed on a top surface and a bottom surface of the antenna substrate, and are vertically overlapped to increase an antenna bandwidth; and a feed network includes a a first ceramic substrate, a second ceramic substrate and a third ceramic substrate. The first ceramic substrate is provided with at least one second connecting electrode and at least one cavity structure, and the second connecting electrode is combined with the first connecting electrode. The cavity structure provides an air medium to increase the antenna gain and the bandwidth; the top surface of the second ceramic substrate is coupled to the first ceramic substrate, and the top surface of the second ceramic substrate is provided with a first ground electrode, the first ground The electrode is provided with at least one slot for electromagnetically coupling the signal through the slot, and feeding the first antenna radiation electrode and the second antenna radiation electrode, and then the antenna Transmitting energy; a top surface of the third ceramic substrate is coupled to a bottom surface of the second ceramic substrate, and a top matching surface and a bottom surface of the third ceramic substrate are respectively provided with a phase matching network and a second ground electrode, the phase matching network The magnitude and phase of the excitation current required to provide the antenna array. The communication antenna array structure of claim 1, wherein the antenna unit corresponds to a cavity structure, and a bottom surface of the cavity structure corresponds to a slot, and a bottom surface of the slot corresponds to a phase matching network. The communication antenna array structure of claim 1, wherein the first antenna radiation electrode and the second antenna radiation electrode are combined with the antenna substrate by a printed circuit technology. The communication antenna array structure according to claim 1, wherein the antenna substrate is a glass fiber material or a flexible circuit board substrate, and comprises PI (Polyamide) and LCP (Liquid Crystal Polymer). A communication antenna array structure includes:
An antenna array includes an antenna substrate and at least one antenna unit. The bottom surface of the antenna substrate is provided with at least one first connection electrode, and the antenna unit has at least one first antenna radiation electrode and at least one second antenna radiation electrode. The first antenna radiation electrode and the second antenna radiation electrode are respectively disposed on a top surface and a bottom surface of the antenna substrate, and are vertically overlapped to increase an antenna bandwidth; and a feed network includes a a first ceramic substrate, a second ceramic substrate and a third ceramic substrate. The first ceramic substrate is provided with at least one second connecting electrode and at least one cavity structure, and the second connecting electrode is combined with the first connecting electrode. The cavity structure provides an air medium to increase antenna gain and bandwidth; a top surface of the second ceramic substrate is coupled to the first ceramic substrate, and a top surface of the second ceramic substrate is provided with a first ground electrode for transmitting signals Transmitting and exciting the first antenna radiation electrode and the second antenna radiation electrode through the approximate coupling feeding, thereby radiating energy; the top surface of the third ceramic substrate and the first Bonding the bottom surface of the ceramic substrate, the third top surface and a bottom surface of the ceramic substrate are provided with a phase matching network and a second ground electrode, the phase matching network antenna array for providing the desired magnitude and phase of the excitation current. The communication antenna array structure according to claim 5, wherein the antenna unit corresponds to a cavity structure, and a bottom surface of the cavity structure corresponds to a slot, and a bottom surface of the slot corresponds to a phase matching network. The communication antenna array structure of claim 5, wherein the first antenna radiation electrode and the second antenna radiation electrode are combined with the antenna substrate by a printed circuit technology. The communication antenna array structure according to claim 5, wherein the antenna substrate is a glass fiber material or a flexible circuit board substrate, and comprises PI (Polyamide) and LCP (Liquid Crystal Polymer).