Miniaturized Omnidirectional Radiation Unit Applied to In-Building Antenna

Abstract

The present application provides a miniaturized omnidirectional radiation unit for indoor distributed antennas, which relates to the field of communication technologies. The miniaturized omnidirectional radiation unit for indoor distributed antennas includes a probe, and a ground plane, a high-dielectric-constant dielectric, a radiation patch, and a coupling patch that are stacked in sequence. Among them, the coupling patch is electrically isolated from the radiation patch, and the center of the coupling patch corresponds to the center of the radiation patch. One end of the probe is connected to the feeding port, and the other end sequentially passes through the ground plane, the high-dielectric-constant dielectric, and the radiation patch to be in electrical contact with the coupling patch. The miniaturized omnidirectional radiation unit for indoor distributed antennas provided by the present application has the characteristics of miniaturization, wideband, and high gain, and optimizes the impedance matching performance, and is applicable to various mobile communication and satellite communication fields.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and particularly to a miniaturized omnidirectional radiation unit applied to indoor distribution antennas. Background Art

[0002] With the rapid development of wireless communication technologies and the popularization of Internet of Things devices, modern communication systems require higher data transmission rates, wider coverage ranges, and more stable signal quality, all of which pose higher requirements for the performance of antennas.

[0003] However, traditional single-frequency antennas have limitations in meeting diverse application requirements. Single-frequency antennas can only operate within a specific frequency range and cannot meet the needs in a multi-band communication environment. To cover multiple frequency bands, multiple single-frequency antennas usually need to work simultaneously, which not only increases the complexity of the system but also significantly raises the cost. In addition, the installation and debugging of multiple antennas are more difficult, which may lead to problems such as signal interference and performance degradation.

[0004] Microstrip patch antennas have simple structures, low manufacturing costs, are easy to integrate and install, and can operate on multiple frequency bands, making them one of the ideal choices for solving multi-band communication requirements. However, microstrip patch antennas have narrow bandwidths, low gains, and are easily affected by dielectric losses and surface waves. These characteristics limit their application ranges to a certain extent. Summary of the Invention

[0005] In view of the above problems, embodiments of the present application provide a miniaturized omnidirectional radiation unit applied to indoor distribution antennas, which has the characteristics of miniaturization, wideband, and high gain, and optimizes the impedance matching performance, and is applicable to various mobile communication and satellite communication fields.

[0006] To achieve the above object, embodiments of the present application provide the following technical solutions:

[0007] The present application provides a miniaturized omnidirectional radiation unit applied to indoor distribution antennas, including: a ground plane; a high-dielectric-constant dielectric, attached to the upper surface of the ground plane; a radiation patch, attached to the upper surface of the high-dielectric-constant dielectric; a coupling patch, disposed above the high-dielectric-constant dielectric and electrically isolated from the radiation patch, and the center of the coupling patch corresponds to the center of the radiation patch; a probe, one end of the probe is connected to the feeding port, and the other end sequentially passes through the ground plane, the high-dielectric-constant dielectric, and the radiation patch and is in electrical contact with the coupling patch.

[0008] In a possible implementation manner, a center hole is opened at the center of the radiation patch, and the diameter of the coupling patch is smaller than the aperture diameter of the center hole.

[0009] In a possible implementation, the cross-sectional area of the high-dielectric-constant medium is smaller than that of the radiation patch, and the ground plane, the radiation patch, and the high-dielectric-constant medium jointly enclose an air layer.

[0010] In a possible implementation, it further includes: a dielectric substrate attached to the upper surface of the radiation patch, and a coupling patch attached to the upper surface of the dielectric substrate.

[0011] In a possible implementation, the dielectric substrate completely covers the radiation patch.

[0012] In a possible implementation, the probe non-contactingly passes through the high-dielectric-constant medium, the radiation patch, and the dielectric substrate.

[0013] In a possible implementation, the ground plane, the high-dielectric-constant medium, the radiation patch, and the dielectric substrate are coaxially arranged.

[0014] In a possible implementation, the maximum diagonal length of the coupling patch is greater than the diameter of the probe.

[0015] In a possible implementation, the high-dielectric-constant medium includes at least one of glass, ceramic, and polymer-based composite material.

[0016] In a possible implementation, the radiation patch includes at least one of a square, a circle, and a polygon.

[0017] The miniaturized omnidirectional radiation unit applied to an in-building antenna provided by this application includes a ground plane, a high-dielectric-constant medium, a radiation patch, a coupling patch, and a probe. Among them, the ground plane can provide necessary electrical grounding and mechanical support for the miniaturized omnidirectional radiation unit. The high-dielectric-constant medium is attached to the upper surface of the ground plane, which can increase the effective dielectric constant of the miniaturized omnidirectional radiation unit and reduce the resonance frequency, thereby realizing miniaturized design. The radiation patch is arranged on the upper surface of the high-dielectric-constant medium, which can convert the radio frequency signal transmitted by the feeder line into electromagnetic waves and radiate them into space. The coupling patch is arranged above the high-dielectric-constant medium and is electrically isolated from the radiation patch. One end of the probe is connected to the feeding port, and the other end sequentially passes through the ground plane, the high-dielectric-constant medium, and the radiation patch to be in electrical contact with the coupling patch, and excites the radiation patch to achieve stable omnidirectional radiation. Compared with the direct feeding method of the probe, the coupling feeding method of the probe and the coupling patch to the radiation patch adopted by this application can ensure stable impedance matching between the two resonance modes of the main mode and the high-order mode, and has better impedance matching performance. In addition, the probe can directly feed the high-dielectric-constant dielectric, so that an additional dielectric resonator radiation mode can be obtained, further increasing the antenna bandwidth and gain. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0019] Figure 1 It is the exploded view of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application;

[0020] Figure 2 It is the cross-sectional view of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application after removing the dielectric substrate;

[0021] Figure 3 It is the top view of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application;

[0022] Figure 4 It is Figure 2 the partial enlarged view of part A in

[0023] Figure 5 It is the return loss diagram of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application;

[0024] Figure 6 It is the gain diagram of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application;

[0025] Figure 7 It is the radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 1.8 GHz;

[0026] Figure 8 It is the radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 1.8 GHz;

[0027] Figure 9 It is the radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 2.2 GHz;

[0028] Figure 10 It is the radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 2.2 GHz;

[0029] Figure 11 It is the radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 2.6 GHz;

[0030] Figure 12 This is the radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiments of the present application at 2.6 GHz.

[0031] Explanation of reference numerals:

[0032] 10 - Miniaturized omnidirectional radiation unit applied to in-building antennas;

[0033] 100 - Ground plane; 200 - High-dielectric constant medium; 300 - Radiation patch; 400 - Coupling patch; 500 - Probe; 600 - Air layer; 700 - Dielectric substrate; 800 - Feeding port;

[0034] 110 - First through-hole; 210 - Second through-hole; 310 - Central hole; 710 - Third through-hole. Detailed implementation manners

[0035] As described in the background art, with the continuous progress of technology and the popularization of wireless communication, the importance of antennas in modern communication systems has become increasingly prominent. Currently, users' expectations for communication systems are not limited to basic connection functions, but also include higher data transmission rates, wider spectrum coverage, and more stable signal quality. These demands have driven the development of antenna design from traditional single functions to the direction of multi-band and multi-functional integration. At the same time, the rise of emerging technologies such as 5G, Internet of Things, and satellite Internet has further intensified the demand for high-performance antennas, requiring them to have higher efficiency, smaller size, and lower cost to meet the complex and changing communication environment and strict technical standards.

[0036] Traditional single-frequency antennas have obvious limitations in dealing with diverse application requirements. Single-frequency antennas can only operate within a specific frequency range, which is clearly unable to meet the needs in a multi-band communication environment. To cover multiple frequency bands, multiple single-frequency antennas usually need to work simultaneously, which not only increases the complexity of the system but also significantly raises the cost. In addition, the installation and debugging processes of multiple antennas become more complex, which may lead to problems such as signal interference and performance degradation.

[0037] Microstrip patch antennas have been widely used in wireless communication systems due to their advantages such as simple structure, small size, light weight, easy integration, and low manufacturing cost. They can operate in multiple frequency bands and are suitable for the miniaturization and multi-functionalization requirements of modern communication devices. However, microstrip patch antennas have a narrow operating bandwidth, low gain, and are easily affected by dielectric losses and surface waves. These disadvantages limit their applications in the rapidly developing mobile communication systems.

[0038] In view of this, an embodiment of the present application provides a miniaturized omnidirectional radiation unit applied to in-building antennas, including a ground plane, a high-dielectric-constant dielectric, a radiation patch, a coupling patch, and a probe. Among them, the ground plane can provide necessary electrical grounding and mechanical support for the miniaturized omnidirectional radiation unit. The high-dielectric-constant dielectric is attached to the upper surface of the ground plane, which can increase the effective dielectric constant of the miniaturized omnidirectional radiation unit and reduce the resonance frequency, thereby achieving miniaturized design. The radiation patch is arranged on the upper surface of the high-dielectric-constant dielectric, which can convert the radio frequency signal transmitted by the feeder line into electromagnetic waves and radiate them into space. The coupling patch is arranged above the high-dielectric-constant dielectric and is electrically isolated from the radiation patch. One end of the probe is connected to the feeding port, and the other end sequentially passes through the ground plane, the high-dielectric-constant dielectric, and the radiation patch to be in electrical contact with the coupling patch, and excites the radiation patch to achieve stable omnidirectional radiation. Compared with the direct feeding method of the probe, the coupling feeding method of the probe and the coupling patch to the radiation patch adopted in the present application can ensure stable impedance matching between the two resonance modes of the main mode and the higher-order mode, and has better impedance matching performance. In addition, the probe can directly feed the high-dielectric-constant dielectric, so that an additional dielectric resonator radiation mode can be obtained, further increasing the antenna bandwidth and gain.

[0039] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] Figure 1 It is a decomposition structure diagram of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiment of the present application. Figure 2 It is a cross-sectional structure diagram of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiment of the present application after removing the dielectric substrate. Figure 3 It is a top view of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiment of the present application.

[0041] Referring to Figures 1 to 3 As shown, an embodiment of the present application provides a miniaturized omnidirectional radiation unit (hereinafter referred to as the radiation unit) applied to in-building antennas. The radiation unit 10 has the advantages of simple structure, miniaturization, wide frequency band, high gain, and omnidirectional radiation, is suitable for various wireless communication systems, and can effectively reduce costs and improve signal coverage efficiency.

[0042] Exemplarily, the radiation unit 10 can be used in the field of wireless communication technology. It can cover multiple frequency bands, meet the requirements of indoor and outdoor mobile communication, satellite communication, and multi-band 5G communication systems. At the same time, due to its simple structure, easy integration, and low cost, the radiation unit 10 is also suitable for wireless network expansion and emergency communication scenarios.

[0043] Combined with Figure 1 、 Figure 2 、 Figure 3 As shown, the radiation unit 10 includes a ground plane 100, a high-dielectric-constant dielectric 200, a radiation patch 300, and a coupling patch 400 that are stacked in sequence. In addition, the radiation unit 10 further includes a probe 500. The probe 500 can sequentially pass through the ground plane 100, the high-dielectric-constant dielectric 200, the radiation patch 300, and be in electrical contact with the coupling patch 400.

[0044] Among them, the ground plane 100 can serve as the reference plane of the antenna, providing a stable electrical reference point, which helps to form the radiation pattern of the radiation unit 10 and reduce interference to other devices. The ground plane 100 can be made of a conductive material to ensure its good conductivity and reflection performance. In addition, considering factors such as the operating frequency, radiation pattern, physical size limitation, and manufacturing process of the radiation unit 10, and according to actual requirements, the ground plane 100 can be one of a square, a circle, or a polygon. This embodiment does not make specific limitations on this.

[0045] The high-dielectric-constant dielectric 200 is attached to the upper surface of the ground plane 100, and the high-dielectric-constant dielectric 200 is coaxially arranged with the ground plane 100. The high-dielectric-constant dielectric 200 has a relatively high relative dielectric constant, which can effectively shorten the wavelength of electromagnetic waves, thereby realizing the miniaturized design of the radiation unit 10. At the same time, it can improve the bandwidth and gain of the radiation unit 10. The high-dielectric-constant dielectric 200 can adopt various geometric shapes, such as a cube, a cylinder, a cuboid, or a prism, to adapt to different design requirements and space limitations. In addition, the ideal high-dielectric-constant dielectric 200 should have high dielectric constant and low loss characteristics. Common materials include glass, ceramics, and polymer-based composite materials. Exemplarily, the high-dielectric-constant dielectric 200 can adopt zirconia ceramics with a relative dielectric constant of 28.

[0046] The radiation patch 300 is attached to the upper surface of the high-dielectric-constant dielectric 200. As the main radiation element of the radiation unit 10, the radiation patch 300 can convert the fed radio frequency signal into electromagnetic waves and radiate these waveforms into the surrounding space, thereby realizing signal transmission and reception. The radiation patch 300 is usually made of a metal material to ensure good conductivity. Its shape can be one of a square, a circle, or a polygon. This embodiment does not make specific limitations on this.

[0047] It should be noted that the high-dielectric constant medium 200 can be disposed at the center of the radiation patch 300, and the cross-sectional area of the high-dielectric constant medium 200 is smaller than that of the radiation patch 300. In this way, the ground plane 100, the radiation patch 300, and the high-dielectric constant medium 200 can jointly enclose an air layer 600.

[0048] Among them, the high-dielectric constant medium 200 can reduce the resonance frequency of the high-order mode during radiation of the radiation unit 10. The dielectric constant of the air layer 600 is close to 1 and generally does not significantly change the resonance frequency of the main mode. Therefore, by reducing the resonance frequency of the high-order mode and keeping the frequency of the main mode unchanged, the frequency interval between the high-order mode and the main mode is reduced. In this way, the operating frequency band of the antenna can be effectively expanded, enabling it to operate effectively within a wider frequency range.

[0049] The coupling patch 400 is disposed on the radiation patch 300 and is electrically isolated from the radiation patch 300. The coupling patch 400 can transfer energy to the radiation patch 300 through electromagnetic coupling. According to actual requirements, the coupling patch 400 can be set as one of a square, a circle, and a polygon.

[0050] In addition, the center of the coupling patch 400 and the center of the radiation patch 300 can be aligned to ensure the symmetry of the radiation unit 10 and the consistency of the phase center, so that signals can be radiated uniformly in all directions.

[0051] Refer to Figure 1 and Figure 3 As shown, the radiation unit 10 may further include a dielectric substrate 700. The dielectric substrate 700 is disposed between the radiation patch 300 and the coupling patch 400 and is coaxially disposed with the radiation patch 300 and the coupling patch 400. The dielectric substrate 700 can isolate the radiation patch 300 from the coupling patch 400 to prevent direct contact between them, which helps to reduce unnecessary current coupling and parasitic effects, thereby improving the performance of the antenna.

[0052] In addition, the dielectric substrate 700 can also provide a firm support and fixation for the radiation unit 10 to ensure its structural stability. Exemplarily, the material of the dielectric substrate 700 can be Rogers RT / duroid 5880(tm). Rogers RT / duroid 5880(tm) is a high-performance microwave-grade circuit material that can be widely used in radio frequency and microwave circuit designs. Its relative dielectric constant is 2.2, and the lower dielectric constant can reduce signal delay and loss, thereby improving signal transmission efficiency.

[0053] Continue to refer to Figure 1As shown, in order to enable the probe 500 to pass through the high dielectric constant medium 200, the radiation patch 300, and the dielectric substrate 700 in a non-contact manner, a first through hole 110 may be provided on the ground plane 100, a second through hole 210 may be provided on the high dielectric constant medium 200, a central hole 310 may be provided on the radiation patch 300, and a third through hole 710 may be provided on the dielectric substrate 700.

[0054] In addition, the radiation unit 10 may further include a feeding port 800. In this way, one end of the probe 500 is connected to the feeding port 800, and the other end sequentially passes through the first through hole 110, the second through hole 210, the central hole 310, and the third through hole 710 to be connected to the coupling patch 400, and performs coupled feeding on the radiation patch 300. Thus, stable omnidirectional radiation can be achieved.

[0055] It should be noted that if the probe 500 contacts the edges of the respective through holes, it will change the impedance characteristics of the antenna, resulting in the failure of impedance matching and increasing the reflection loss. Therefore, the aperture diameters of the first through hole 110, the second through hole 210, the third through hole 710, and the central hole 310 are all larger than the diameter of the probe 500 to avoid the probe 500 contacting the edges of the first through hole 110, the second through hole 210, the third through hole 710, and the central hole 310, thereby ensuring the stability and performance of the antenna. In addition, in order to further optimize the electromagnetic performance of the radiation unit 10, the aperture diameter of the central hole 310 may be larger than the diameter of the coupling patch 400.

[0056] Compared with the traditional method of directly feeding the probe 500, in this embodiment, the radiation patch 300 is coupled and fed through the probe 500 connected to the coupling patch 400, effectively ensuring the stable impedance matching between the main mode and the high-order mode, and making it have better impedance matching performance. It not only improves the performance of the radiation unit 10, but also expands its operating bandwidth, ensuring more efficient signal transmission and reception.

[0057] In addition, when the probe 500 passes through the high dielectric constant medium 200, it can directly feed the high dielectric constant medium 200, thereby exciting the dielectric resonator mode of the high dielectric constant medium 200, and introducing an additional resonance point, expanding the bandwidth of the antenna. In this way, without increasing the size of the radiation unit 10, the operating bandwidth of the radiation unit 10 can be effectively expanded, enabling it to maintain good performance in a wider frequency range.

[0058] In the embodiment of the present application, the radiation unit 10 with an impedance bandwidth of 1.7 - 3.41 GHz is taken as an example for testing.

[0059] Figure 4 For Figure 2 the partial enlarged view of part A. Combining Figures 1 to 4As shown, in this embodiment, the ground plane 100, the coupling patch 400, the radiation patch 300, and the dielectric substrate 700 are circular, and the high-dielectric-constant dielectric 200 is cylindrical as an example. The optimized dimensions of the radiation unit 10 are as follows: the radius Rg of the ground plane 100 is 80 mm, the radius Rz of the high-dielectric-constant dielectric 200 is 15 mm, the radius Rp of the dielectric substrate 700 is 27 mm, the radius Rt of the coupling patch 400 is 3 mm, the diameter of the probe 500 is 2×Rn = 1.3 mm, the height of the high-dielectric-constant dielectric 200 and the height of the air layer are Hz = 12.2 mm, the thickness of the dielectric substrate 700 is 0.252 mm, the height of the probe 500 is the sum of the thickness of the dielectric substrate 700 and the height of the high-dielectric-constant dielectric 200, that is, 0.252 mm + 12.2 mm = 12.452 mm, the aperture of the central hole is 2×Rc = 10 mm, the inner diameter of the first through hole 110 is 3 mm, the inner diameter of the second through hole 210 is 2×Rh = 1.56 mm, and the inner diameter of the third through hole 710 is 1.3 mm.

[0060] Figure 5 This is the return loss diagram of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application. The return loss diagram shows the matching performance of the radiation unit 10 in this frequency range. A lower return loss value indicates better matching between the radiation unit 10 and the transmission line, meaning that more signal energy is transmitted to the radiation unit 10 with less reflection. Refer to Figure 5 As shown, the radiation unit 10 has an impedance bandwidth of 66.9% in the frequency range of 1.7 - 3.41 GHz. This shows that the radiation unit 10 provided by this embodiment can effectively transmit and receive signals in the omnidirectional radiation mode, has good impedance matching performance, and can further match multi-band communication systems.

[0061] Figure 6 This is the gain diagram of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application. Refer to Figure 6 As shown, the gain of the radiation unit 10 in the frequency band of 1.7 - 3.41 GHz is 3.84 ± 0.98 dBi. This shows that the radiation unit 10 can provide consistent signal gain in a wide frequency band range and can be used in various wireless communication application scenarios, such as mobile communication and satellite communication, etc., ensuring reliable performance and excellent coverage effect in different frequency bands.

[0062] Figure 7 This is the radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 1.8 GHz. Figure 8 This is the radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to the in-building antenna provided by the embodiment of the present application at 1.8 GHz. Figure 9The radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiments of the present application at 2.2 GHz. Figure 10 The radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiments of the present application at 2.2 GHz. Figure 11 The radiation pattern in the horizontal plane of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiments of the present application at 2.6 GHz. Figure 12 The radiation pattern in the vertical plane of the miniaturized omnidirectional radiation unit applied to in-building antennas provided by the embodiments of the present application at 2.6 GHz.

[0063] Figures 7 to 12 It shows the radiation patterns in the horizontal and vertical planes of the omnidirectional radiation mode of the radiation unit 10 at frequencies of 1.8 GHz, 2.2 GHz, and 2.6 GHz respectively, indicating the radiation characteristics at different operating frequencies. In the radiation pattern, the X-pol curve represents the cross-polarization level, and the Co-pol curve represents the co-polarization level. The comparison between the cross-polarization and the co-polarization can reflect the polarization isolation performance of the antenna. Refer to Figures 7 to 12 As shown, the radiation unit 10 provided in this embodiment operates stably in the omnidirectional radiation mode at three different frequencies of 1.8 GHz, 2.2 GHz, and 2.6 GHz. The co-polarization level (Co-pol) is relatively uniform in all directions in the horizontal plane, while the cross-polarization level (X-pol) is low, indicating that the radiation unit 10 has good omnidirectional radiation characteristics and low cross-polarization interference, demonstrating that it maintains good omnidirectional radiation performance within a wide frequency band.

[0064] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0065] In the description of this specification, the description with reference to terms such as "one implementation manner", "some implementation manners", "illustrative implementation manners", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A miniaturized omnidirectional radiation unit for indoor antenna, characterized in that: include: Ground Plate (100); A high dielectric constant medium (200) is attached to the upper surface of the ground plate (100); A radiation patch (300) is attached to the upper surface of the high dielectric constant medium (200); A coupling patch (400) is disposed on the high dielectric constant medium (200) and is electrically isolated from the radiation patch (300), wherein the coupling patch (400) corresponds to the center of the radiation patch (300); A probe (500), one end of the probe being connected to the feed port, and the other end of the probe sequentially passing through the ground plate (100), the high dielectric constant medium (200), and the radiation patch (300) to be in electrical contact with the coupling patch (400); The cross-sectional area of ​​the high dielectric constant medium (200) is smaller than the cross-sectional area of ​​the radiation patch (300); the ground plate (100), the radiation patch (300) and the high dielectric constant medium (200) together form an air layer (600).

2. The radiation unit according to claim 1, characterized in that: A central hole (310) is opened at the center of the radiation patch (300), and the diameter of the coupling patch (400) is smaller than the aperture of the central hole (310).

3. The radiation unit according to claim 1, characterized in that: Also includes: The dielectric substrate (700) is attached to the upper surface of the radiation patch (300), and the coupling patch (400) is attached to the upper surface of the dielectric substrate (700).

4. The radiation unit according to claim 3, characterized in that: The dielectric substrate (700) completely covers the radiation patch (300).

5. The radiation unit according to any one of claims 1 to 4, characterized in that: The probe (500) passes through the high dielectric constant medium (200), the radiation patch (300), and the dielectric substrate (700) in a non-contact manner.

6. The radiation unit according to any one of claims 1 to 4, characterized in that: The ground plate (100), the high dielectric constant medium (200), the radiation patch (300) and the dielectric substrate (700) are coaxially arranged.

7. The radiation unit according to any one of claims 1 to 4, characterized in that: The maximum diagonal or diameter length of the coupling patch (400) is greater than the diameter of the probe (500).

8. The radiation unit according to any one of claims 1 to 4, characterized in that: The high dielectric constant medium (200) comprises at least one of glass, ceramic, and polymer-based composite materials.

9. The radiation unit according to any one of claims 1 to 4, characterized in that: The radiation patch (300) comprises at least one of a circular shape and a polygonal shape.

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