Broadband low-profile reconfigurable indoor antenna

Abstract

An embodiment of the present application provides a broadband, low-profile, reconfigurable indoor antenna, comprising: a dielectric substrate, first and second triangular patch resonators, first to fourth radiating elements, first to sixth switch modules, a metal ground, a feed node and a feed metal hole, wherein the first and second triangular patch resonators are isosceles right-angled triangle patch resonators, the feed node is connected to a coaxial probe passing through the feed metal hole, the triangular patch resonator and the radiating element are connected via a switch module, and the first and second triangular patch resonators are respectively connected to the metal ground. The broadband, low-profile, reconfigurable indoor antenna provided by the present application can flexibly adjust the radiation direction according to the orientation of the interference source, thereby increasing indoor communication efficiency.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a broadband, low-profile, reconfigurable indoor antenna. Background Art

[0002] The development of modern wireless communication technology has created an urgent need for indoor coverage. However, the inherent electromagnetic shielding of building materials and the multipath interference effects of complex indoor structures can lead to severe attenuation of wireless signals, thus affecting network communication quality and efficiency. Therefore, as the core physical layer component of indoor networks, the design and deployment of indoor antennas directly impact user experience and network performance.

[0003] Existing indoor antenna design technology mainly focuses on achieving broadband and omnidirectional radiation of the antenna. By loading additional radiating units on the top of the traditional monopole antenna, the antenna's operating bandwidth is expanded and broadband omnidirectional radiation characteristics are achieved.

[0004] However, existing omnidirectional radiation solutions are prone to channel interference when there are multiple communication sources indoors, seriously affecting communication quality. Summary of the Invention

[0005] The embodiments of the present application provide a broadband, low-profile, reconfigurable indoor antenna, which can reduce channel interference in the presence of multiple communication sources to increase indoor communication quality and efficiency.

[0006] An embodiment of the present application provides a broadband, low-profile, reconfigurable indoor antenna, comprising: a dielectric substrate, first and second triangular patch resonators, first to fourth radiating elements, first to sixth switch modules, and a metal ground. The dielectric substrate includes a feed node, the metal ground includes a feed metal hole, the feed node is connected to a coaxial probe passing through the feed metal hole, and the first and second triangular patch resonators are isosceles right triangle patch resonators.

[0007] The first switch module is connected to the first triangular patch resonator and the first radiation unit respectively, and is used to control the conduction between the two;

[0008] The second switch module is connected to the first triangular patch resonator and the second radiating unit respectively, for controlling conduction between the two;

[0009] The third switch module is connected to the second triangular patch resonator and the third radiation unit respectively, and is used to control the conduction between the two;

[0010] The fourth switch module is connected to the second triangular patch resonator and the fourth radiation unit respectively, and is used to control the conduction between the two;

[0011] The fifth switch module is connected to the feeding node and the first triangular patch resonator respectively, and is used to control the conduction between the two;

[0012] The sixth switch module is connected to the feeding node and the second triangular patch resonator respectively, and is used to control the conduction between the two;

[0013] The first and second triangular patch resonators are respectively connected to the metal ground.

[0014] In one possible embodiment, the first triangular patch resonator includes first to third metal rows of holes for connecting the first triangular patch resonator to a metal ground, wherein the first metal row of holes is located at a first bottom corner of the first triangular patch resonator and is parallel to a first right-angled side of the first triangular patch resonator, the third metal row of holes is located at a second bottom corner of the first triangular patch resonator and is parallel to a second right-angled side of the first triangular patch resonator, and the second metal row of holes is located at a top corner of the first triangular patch resonator and is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the first triangular patch resonator;

[0015] The second triangular patch resonator includes fourth to sixth metal rows of holes for connecting the second triangular patch resonator to the metal ground, wherein the fourth metal row of holes is located at the first bottom corner of the second triangular patch resonator and is parallel to the first right-angled side of the second triangular patch resonator, the sixth metal row of holes is located at the second bottom corner of the second triangular patch resonator and is parallel to the second right-angled side of the second triangular patch resonator, and the fifth metal row of holes is located at the top corner of the second triangular patch resonator. The second triangular patch resonator is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the second triangular patch resonator.

[0016] In a possible implementation, the first radiation unit includes first and second radiation arms, and the first switch module includes first and second diodes;

[0017] The first diode is connected to the first triangular patch resonator and the first radiation arm respectively, and is used to control the conduction between the two;

[0018] The second diode is connected to the first triangular patch resonator and the second radiation arm respectively, and is used to control the conduction between the two.

[0019] In a possible implementation, the first radiation arm includes a first radiation branch and a first microstrip transmission line, and the second radiation arm includes a second radiation branch and a second microstrip transmission line;

[0020] The first microstrip transmission line is connected to the first diode and the first radiation branch respectively;

[0021] The second microstrip transmission line is connected to the second diode and the second radiation branch respectively.

[0022] In a possible implementation manner, the second radiation unit includes third and fourth radiation arms, and the second switch module includes third and fourth diodes;

[0023] The third diode is connected to the first triangular patch resonator and the third radiation arm respectively, and is used to control the conduction between the two;

[0024] The fourth diode is connected to the first triangular patch resonator and the fourth radiation arm respectively, and is used for conduction between the two.

[0025] In a possible implementation, the third radiation arm includes a third radiation branch and a third microstrip transmission line, and the fourth radiation arm includes a fourth radiation branch and a fourth microstrip transmission line;

[0026] The third microstrip transmission line is connected to the third diode and the third radiation branch respectively;

[0027] The fourth microstrip transmission line is connected to the fourth diode and the fourth radiation branch respectively.

[0028] In a possible implementation, the third radiation unit includes fifth and sixth radiation arms, and the third switch module includes fifth and sixth diodes;

[0029] The fifth diode is connected to the second triangular patch resonator and the fifth radiation arm respectively, and is used to control the conduction between the two;

[0030] The sixth diode is connected to the second triangular patch resonator and the sixth radiation arm respectively, and is used to control conduction between the two.

[0031] In a possible implementation manner, the fifth radiation arm includes a fifth radiation branch and a fifth microstrip transmission line, and the sixth radiation arm includes a sixth radiation branch and a sixth microstrip transmission line;

[0032] The fifth microstrip transmission line is connected to the fifth diode and the fifth radiation branch respectively;

[0033] The sixth microstrip transmission line is connected to the sixth diode and the sixth radiation branch respectively.

[0034] In a possible implementation manner, the fourth radiation unit includes seventh and eighth radiation arms, and the fourth switch module includes seventh and eighth diodes;

[0035] The seventh diode is connected to the second triangular patch resonator and the seventh radiation arm respectively, and is used to control conduction between the two;

[0036] The eighth diode is connected to the second triangular patch resonator and the eighth radiation arm respectively, and is used to control conduction between the two.

[0037] In a possible implementation, the seventh radiation arm includes a seventh radiation branch and a seventh microstrip transmission line, and the eighth radiation arm includes an eighth radiation branch and an eighth microstrip transmission line;

[0038] The seventh microstrip transmission line is connected to the seventh diode and the seventh radiation branch respectively;

[0039] The eighth microstrip transmission line is connected to the eighth diode and the eighth radiation branch respectively.

[0040] In a possible implementation, the fifth switch module includes a ninth diode, and the sixth switch module includes a tenth diode.

[0041] In a possible implementation, the present invention further includes: ninth and tenth microstrip lines;

[0042] The ninth microstrip line is connected to the ninth diode and the first triangular patch resonator respectively;

[0043] The tenth microstrip line is connected to the tenth diode and the second triangular patch resonator respectively.

[0044] The broadband, low-profile, reconfigurable indoor antenna provided by an embodiment of the present application includes: a dielectric substrate, first and second triangular patch resonators, first to fourth radiating elements, first to sixth switch modules, and a metal ground, wherein the dielectric substrate includes a feed node, the metal ground includes a feed metal hole, the feed node is connected to a coaxial probe passing through the feed metal hole, and the first and second triangular patch resonators are in the shape of isosceles right triangle patch resonators. The first switch module is respectively connected to the first triangular patch resonator and the first radiating element, the second switch module is respectively connected to the first triangular patch resonator and the second radiating element, the third switch module is respectively connected to the second triangular patch resonator and the third radiating element, the fourth switch module is respectively connected to the second triangular patch resonator and the fourth radiating element, the fifth switch module is respectively connected to the feed node and the first triangular patch resonator, the sixth switch module is respectively connected to the feed node and the second triangular patch resonator, and the first triangular patch resonator and the second triangular patch resonator are respectively connected to the metal ground. The present application provides multiple switch modules to flexibly switch the radiation units that are turned on, and can flexibly adjust the radiation direction according to the location of the interference source, thereby increasing indoor communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] Figure 1 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 1 ;

[0047] Figure 2 TM of an isosceles right triangle patch resonator as an example 22 Schematic diagram of resonance mode;

[0048] Figure 3 Schematic diagram of radiation direction for example;

[0049] Figure 4 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 2 ;

[0050] Figure 5 Schematic diagram of the S parameters of the broadband low-profile reconfigurable indoor antenna;

[0051] Figure 6 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 3 ;

[0052] Figure 7 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 4 ;

[0053] Figure 8 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 5 ;

[0054] Figure 9 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 6 ;

[0055] Figure 10 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 7 ;

[0056] Figure 11 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 8 ;

[0057] Figure 12 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 9 ;

[0058] Figure 13 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 ;

[0059] Figure 14 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 one;

[0060] Figure 15 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 two;

[0061] Figure 16 Schematic diagram of the size parameters of a broadband low-profile reconfigurable indoor antenna as an example.

[0062] Description of reference numerals:

[0063] 1: The first metal row of holes;

[0064] 2: The second metal row of holes;

[0065] 3: The third metal row of holes;

[0066] 4: The fourth metal row of holes;

[0067] 5: Fifth metal row hole;

[0068] 6: Sixth metal row hole;

[0069] 7: first radiate branch;

[0070] 8: First microstrip transmission line;

[0071] 9: second radiate branch;

[0072] 10: second microstrip transmission line 10;

[0073] 11: third radiate branch;

[0074] 12: The third microstrip transmission line;

[0075] 13: Fourth radiate branch 13;

[0076] 14: fourth microstrip transmission line 14;

[0077] 15: Fifth radiate branch 15;

[0078] 16: Fifth microstrip transmission line;

[0079] 17: Sixth radiate branch;

[0080] 18: Sixth microstrip transmission line;

[0081] 19: Seventh radiate branch;

[0082] 20: Seventh microstrip transmission line;

[0083] 21: eighth radiate branch;

[0084] 22: Eighth microstrip transmission line;

[0085] 23: feeder node;

[0086] 24: Ninth microstrip line;

[0087] 25: tenth microstrip line;

[0088] AD1: first diode;

[0089] AD2: second diode;

[0090] AD3: the third diode;

[0091] AD4: fourth diode;

[0092] AD5: fifth diode;

[0093] AD6: sixth diode;

[0094] AD7: seventh diode;

[0095] AD8: eighth diode.

[0096] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0097] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0098] First, let’s explain the terms involved in this application:

[0099] Indoor antenna: It is a key device in the mobile communication network. It distributes the signal of the mobile communication base station evenly to every corner of the room to ensure ideal signal coverage in the indoor area.

[0100] Coaxial probe: A coaxial probe is a probe used for high-frequency signal testing, and is mainly used in test environments that are sensitive to test frequencies.

[0101] Indoors, the inherent shielding effect of building materials can cause wireless signal penetration loss, impacting network communication quality and efficiency. Existing technology can significantly expand the antenna's operating bandwidth by adding two additional radiating elements to the top of a traditional monopole antenna, achieving broadband radiation characteristics. However, these existing solutions offer omnidirectional radiation, making channel interference more likely when multiple communication sources are present indoors.

[0102] An embodiment of the present application provides a broadband, low-profile, reconfigurable indoor antenna, comprising: a dielectric substrate, a first triangular patch resonator, a second triangular patch resonator, a first radiating unit, a second radiating unit, a third radiating unit, a fourth radiating unit, a first switch module, a second switch module, a third switch module, a fourth switch module, a fifth switch module, a sixth switch module, and a metal ground. The dielectric substrate includes a feeding node, the metal ground includes a feeding metal hole, the feeding node is connected to a coaxial probe passing through the feeding metal hole, and the first and second triangular patch resonators are isosceles right triangle patch resonators. The first switch module is connected to the first triangular patch resonator and the first radiation unit respectively, the second switch module is connected to the first triangular patch resonator and the second radiation unit respectively, the third switch module is connected to the second triangular patch resonator and the third radiation unit respectively, the fourth switch module is connected to the second triangular patch resonator and the fourth radiation unit respectively, the fifth switch module is connected to the feeding node and the first triangular patch resonator respectively, the sixth switch module is connected to the feeding node and the second triangular patch resonator respectively, and the first triangular patch resonator and the second triangular patch resonator are connected to the metal ground respectively. The present application provides multiple switch modules to flexibly switch the radiation units that are turned on, and can flexibly adjust the radiation direction according to the orientation of the interference source, thereby increasing the efficiency of indoor communication.

[0103] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0104] Figure 1 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 1 ,like Figure 1As shown, a broadband low-profile reconfigurable indoor antenna includes: a dielectric substrate, first and second triangular patch resonators, first to fourth radiating elements, first to sixth switch modules, and a metal ground. The dielectric substrate includes a feeding node, the metal ground includes a feeding metal hole, the feeding node is connected to a coaxial probe passing through the feeding metal hole, and the first and second triangular patch resonators are isosceles right triangle patch resonators.

[0105] The first switch module is connected to the first triangular patch resonator and the first radiation unit respectively, and is used to control the conduction between the two;

[0106] The second switch module is connected to the first triangular patch resonator and the second radiating unit respectively, for controlling conduction between the two;

[0107] The third switch module is connected to the second triangular patch resonator and the third radiation unit respectively, and is used to control the conduction between the two;

[0108] The fourth switch module is connected to the second triangular patch resonator and the fourth radiation unit respectively, and is used to control the conduction between the two;

[0109] The fifth switch module is connected to the feeding node and the first triangular patch resonator respectively, and is used to control the conduction between the two;

[0110] The sixth switch module is connected to the feeding node and the second triangular patch resonator respectively, and is used to control the conduction between the two;

[0111] The first and second triangular patch resonators are respectively connected to the metal ground.

[0112] Combined with the scene example, combined with Figure 1 , the node constant between the dielectric substrate and the metal ground is 3.55, the thickness of the dielectric plate is 0.813, the feeding metal hole is located in the center of the dielectric substrate, and the structure of the room antenna is 180° centrally symmetrical along the center of the dielectric substrate. The coaxial probe passes through the feeding metal hole and is connected to the feeding node. Specifically, the feeding node is formed by the inner conductor of the coaxial probe passing through the feeding metal hole and connected to the transmission line on the upper surface of the dielectric substrate, and the outer conductor of the feeding coaxial is connected to the metal ground on the lower surface of the dielectric substrate to form a common ground structure. The RF signal can enter the feeding node through the feeding metal hole. When the fifth switch module is turned on, the RF signal can enter the first triangular patch resonator from the feeding node. When the sixth switch module is turned on, the RF signal can enter the second triangular patch resonator from the feeding node. The first triangular patch resonator and the second triangular patch resonator are isosceles right triangle patch resonators. Figure 2 TM of an isosceles right triangle patch resonator as an example 22 Schematic diagram of resonance mode, such as Figure 2As shown in the figure, there are electric field distributions with the same amplitude and opposite phase on both right-angled sides of the isosceles right triangle patch resonator, so that a pair of balanced signals can be output in two perpendicular directions. Therefore, by controlling the conduction and shutdown of the six switch modules, one of the four radiating units can be turned on and the other three can be turned off at a time to achieve switching of the radiation direction. Specifically, Figure 3 The radiation direction diagram is an example. When the fifth switch module is controlled to be turned on with the first switch module, the first radiation unit can be turned on, and the second radiation unit, the third radiation unit and the fourth radiation unit can be turned off. Figure 3 (a), the radiation direction is upward. When the fifth switch module and the second switch module are controlled to be turned on, the second radiation unit can be turned on, and the first radiation unit, the third radiation unit and the fourth radiation unit can be turned off. Figure 3 (d), the radiation direction is left. When the sixth switch module and the third switch module are turned on, the third radiation unit can be turned on, and the first radiation unit, the second radiation unit and the fourth radiation unit are turned off. Figure 3 (b), the radiation direction is right. When the sixth switch module and the fourth switch module are turned on, the fourth radiation unit can be turned on, and the second radiation unit, the third radiation unit and the first radiation unit are turned off. Figure 3 (c), the radiation direction is downward. Figure 3 It can be seen that the gain of the indoor antenna in the maximum radiation direction is 3.64dBi, and the cross-polarization is less than -20dB.

[0113] The broadband low-profile reconfigurable indoor antenna provided in this example can flexibly switch the radiating units through multiple switch modules, and can flexibly adjust the radiation direction according to the direction of the interference source, thereby increasing indoor communication efficiency.

[0114] Optional, Figure 4 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 2 ,like Figure 4 As shown, the first triangular patch resonator includes first to third metal rows of holes for connecting the first triangular patch resonator to the metal ground, wherein the first metal row of holes 1 is located at the first bottom corner of the first triangular patch resonator and is parallel to the first right-angled side of the first triangular patch resonator, the third metal row of holes 3 is located at the second bottom corner of the first triangular patch resonator and is parallel to the second right-angled side of the first triangular patch resonator, and the second metal row of holes 2 is located at the top corner of the first triangular patch resonator. The second metal row of holes is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the first triangular patch resonator;

[0115] The second triangular patch resonator includes fourth to sixth metal rows of holes for connecting the second triangular patch resonator to the metal ground, wherein the fourth metal row of holes 4 is located at the first bottom corner of the second triangular patch resonator and is parallel to the first right-angled side of the second triangular patch resonator, the sixth metal row of holes 6 is located at the second bottom corner of the second triangular patch resonator and is parallel to the second right-angled side of the second triangular patch resonator, and the fifth metal row of holes 5 is located at the top corner of the second triangular patch resonator. It is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the second triangular patch resonator.

[0116] Combined with the scene example, combined with Figure 4 , the right angle of the isosceles right triangle corresponding to the first triangular patch resonator can be determined as the vertex angle of the first triangular patch resonator, the right base angle can be determined as the first base angle of the first triangular patch resonator, and the left base angle can be determined as the second base angle of the first triangular patch resonator. Similarly, the right angle of the isosceles right triangle corresponding to the second triangular patch resonator can be determined as the vertex angle of the second triangular patch resonator, the right base angle can be determined as the first base angle of the second triangular patch resonator, and the left base angle can be determined as the second base angle of the second triangular patch resonator. After the first metal row of holes 1, the second metal row of holes 2, and the third metal row of holes 3 on the first triangular patch resonator are connected to the metal ground, the resonant mode of the first triangular patch resonator can be changed into two. Combined with the radiation unit on the first triangular patch resonator, there are three resonant modes in total. Similarly, after the fourth metal row of holes 4, the fifth metal row of holes 5, and the sixth metal row of holes 6 on the second triangular patch resonator are connected to the metal ground, the resonant mode of the second triangular patch resonator can be changed into two. Combined with the radiating unit on the second triangular patch resonator, there are three resonance points, that is, three resonant modes, thus achieving broadband radiation. The S parameters of the indoor antenna can be obtained by simulation software. Figure 5 Schematic diagram of the S parameters of the broadband low-profile reconfigurable indoor antenna, as shown in Figure 5 The center frequency of the indoor antenna is 3.55GHz, the operating bandwidth is 11.6%, and the in-band reflection coefficient is less than -10dB.

[0117] Based on the broadband, low-profile, reconfigurable indoor antenna provided in this example, after connecting the triangular patch resonator to the metal ground through metal holes, the operating bandwidth of the indoor antenna can be increased by adding resonant modes, thereby obtaining broadband radiation characteristics.

[0118] Optional, Figure 6 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 3 ,like Figure 6As shown, the first radiation unit includes first and second radiation arms, and the first switch module includes first and second diodes;

[0119] The first diode AD1 is connected to the first triangular patch resonator and the first radiation arm respectively, for controlling conduction between the two;

[0120] The second diode AD2 is connected to the first triangular patch resonator and the second radiation arm respectively, for controlling conduction between the two.

[0121] In this scenario example, when the operating voltage of the first diode AD1 reaches the preset turn-on voltage, the first diode AD1 is turned on, and the first radiating arm and the first triangular patch resonator are now conducting. Similarly, when the operating voltage of the second diode AD2 reaches the preset turn-on voltage, the second diode AD2 is turned on, and the second radiating arm and the first triangular patch resonator are now conducting.

[0122] Based on the broadband low-profile reconfigurable indoor antenna provided in this example, the operating states of the first diode AD1 and the second diode AD2 can be controlled by controlling the operating voltages of the first diode AD1 and the second diode AD2.

[0123] Optional, Figure 7 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 4 ,like Figure 7 As shown, the first radiation arm includes a first radiation branch 7 and a first microstrip transmission line 8, and the second radiation arm includes a second radiation branch 9 and a second microstrip transmission line 10;

[0124] The first microstrip transmission line 8 is connected to the first diode AD1 and the first radiation branch 7 respectively;

[0125] The second microstrip transmission line 10 is connected to the second diode AD2 and the second radiation branch 9 respectively.

[0126] In this scenario example, after the first diode AD1 is turned on, the RF signal can be transmitted from the first triangular patch resonator to the first radiating branch 7 via the first microstrip transmission line 8. After the second diode AD2 is turned on, the RF signal can be transmitted from the first triangular patch resonator to the second radiating branch 9 via the second microstrip transmission line 10. The first microstrip transmission line 8 and the second microstrip transmission line 10 together form a pair of balanced outputs, and the first radiating branch 7 and the second radiating branch 9 together form a pair of dipole antennas.

[0127] The broadband, low-profile, reconfigurable indoor antenna provided in this example can transmit radio frequency signals through the first microstrip transmission line 8 and the second microstrip transmission line 10.

[0128] Optional, Figure 8 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 5 ,like Figure 8 As shown, the second radiation unit includes third and fourth radiation arms, and the second switch module includes third and fourth diodes;

[0129] The third diode AD3 is connected to the first triangular patch resonator and the third radiation arm respectively, for controlling conduction between the two;

[0130] The fourth diode AD4 is connected to the first triangular patch resonator and the fourth radiation arm respectively, and is used to control conduction between the two.

[0131] In this scenario example, when the operating voltage of the third diode AD3 reaches a preset turn-on voltage, the third diode AD3 is turned on, and the third radiating arm and the first triangular patch resonator are now conducting. Similarly, when the operating voltage of the fourth diode AD4 reaches a preset turn-on voltage, the fourth diode AD4 is turned on, and the fourth radiating arm and the first triangular patch resonator are now conducting.

[0132] Based on the broadband low-profile reconfigurable indoor antenna provided in this example, the operating states of the third diode AD3 and the fourth diode AD4 can be controlled by controlling the operating voltages of the third diode AD3 and the fourth diode AD4.

[0133] Optional, Figure 9 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 6 ,like Figure 9 As shown, the third radiation arm includes a third radiation branch 11 and a third microstrip transmission line 12, and the fourth radiation arm includes a fourth radiation branch 13 and a fourth microstrip transmission line 14;

[0134] The third microstrip transmission line 12 is connected to the third diode AD3 and the third radiation branch 11 respectively;

[0135] The fourth microstrip transmission line 14 is connected to the fourth diode AD4 and the fourth radiation branch 13 respectively.

[0136] In this scenario example, after the third diode AD3 is turned on, the RF signal can be transmitted from the first triangular patch resonator to the third radiating branch 11 via the third microstrip transmission line 12. After the fourth diode AD4 is turned on, the RF signal can be transmitted from the first triangular patch resonator to the fourth radiating branch 13 via the fourth microstrip transmission line 14. The third microstrip transmission line 12 and the fourth microstrip transmission line 14 together form a pair of balanced outputs, and the third radiating branch 11 and the fourth radiating branch 13 together form a pair of dipole antennas.

[0137] The broadband, low-profile, reconfigurable indoor antenna provided in this example can transmit radio frequency signals through the third microstrip transmission line 12 and the fourth microstrip transmission line 14 .

[0138] Optional, Figure 10 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 7 ,like Figure 10 As shown, the third radiation unit includes fifth and sixth radiation arms, and the third switch module includes fifth, second and sixth diodes;

[0139] The fifth diode AD5 is connected to the second triangular patch resonator and the fifth radiation arm respectively, and is used to control the conduction between the two;

[0140] The sixth diode AD6 is connected to the second triangular patch resonator and the sixth radiation arm respectively, and is used to control conduction between the two.

[0141] In this scenario example, when the operating voltage of the fifth diode AD5 reaches a preset turn-on voltage, the fifth diode AD5 is turned on, and the fifth radiating arm and the second triangular patch resonator are now conductive. Similarly, when the operating voltage of the sixth diode AD6 reaches a preset turn-on voltage, the sixth diode AD6 is turned on, and the sixth radiating arm and the second triangular patch resonator are now conductive.

[0142] Based on the broadband low-profile reconfigurable indoor antenna provided in this example, the working states of the fifth diode AD5 and the sixth diode AD6 can be controlled by controlling the working voltages of the fifth diode AD5 and the sixth diode AD6.

[0143] Optional, Figure 11 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 8 ,like Figure 11 As shown, the fifth radiation arm includes a fifth radiation branch 15 and a fifth microstrip transmission line 16, and the sixth radiation arm includes a sixth radiation branch 17 and a sixth microstrip transmission line 18;

[0144] The fifth microstrip transmission line 16 is connected to the fifth diode AD5 and the fifth radiation branch 15 respectively;

[0145] The sixth microstrip transmission line 18 is connected to the sixth diode AD6 and the sixth radiation branch 17 respectively.

[0146] In this scenario example, after the fifth diode AD5 is turned on, the RF signal can be transmitted from the second triangular patch resonator to the fifth radiating branch 15 via the fifth microstrip transmission line 16. After the sixth diode AD6 is turned on, the RF signal can be transmitted from the second triangular patch resonator to the sixth radiating branch 17 via the sixth microstrip transmission line 18. The fifth microstrip transmission line 16 and the sixth microstrip transmission line 18 together form a pair of balanced outputs, and the fifth radiating branch 15 and the sixth radiating branch 17 together form a pair of dipole antennas.

[0147] The broadband, low-profile, reconfigurable indoor antenna provided in this example can transmit radio frequency signals through the fifth microstrip transmission line 16 and the sixth microstrip transmission line 18 .

[0148] Optional, Figure 12 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 9 ,like Figure 12 As shown, the fourth radiation unit includes a seventh radiation arm and an eighth radiation arm, and the fourth switch module includes a seventh diode and an eighth diode;

[0149] The seventh diode AD7 is connected to the second triangular patch resonator and the seventh radiation arm respectively, and is used to control conduction between the two;

[0150] The eighth diode AD8 is connected to the second triangular patch resonator and the eighth radiation arm respectively, and is used to control conduction between the two.

[0151] In this scenario example, when the operating voltage of the seventh diode AD7 reaches a preset turn-on voltage, the seventh diode AD7 is turned on, and the seventh radiating arm and the second triangular patch resonator are now conductive. Similarly, when the operating voltage of the eighth diode AD8 reaches a preset turn-on voltage, the eighth diode AD8 is turned on, and the eighth radiating arm and the second triangular patch resonator are now conductive.

[0152] Based on the broadband low-profile reconfigurable indoor antenna provided in this example, the working states of the seventh diode AD7 and the eighth diode AD8 can be controlled by controlling the working voltages of the seventh diode AD7 and the eighth diode AD8.

[0153] Optional, Figure 13 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 ,like Figure 13 As shown, the seventh radiation arm includes a seventh radiation branch 19 and a seventh microstrip transmission line 20, and the eighth radiation arm includes an eighth radiation branch 21 and an eighth microstrip transmission line 22;

[0154] The seventh microstrip transmission line 20 is connected to the seventh diode AD7 and the seventh radiation branch 19 respectively;

[0155] The eighth microstrip transmission line 22 is connected to the eighth diode AD8 and the eighth radiation branch 21 respectively.

[0156] In this scenario example, after the seventh diode AD7 is turned on, the RF signal can be transmitted from the second triangular patch resonator to the seventh radiating branch 19 via the seventh microstrip transmission line 20. After the eighth diode AD8 is turned on, the RF signal can be transmitted from the second triangular patch resonator to the eighth radiating branch 21 via the eighth microstrip transmission line 22. The seventh microstrip transmission line 20 and the eighth microstrip transmission line 22 together form a pair of balanced outputs, and the seventh radiating branch 19 and the eighth radiating branch 21 together form a pair of dipole antennas.

[0157] The broadband, low-profile, reconfigurable indoor antenna provided in this example can transmit radio frequency signals through the seventh microstrip transmission line 20 and the eighth microstrip transmission line 22 .

[0158] Optional, Figure 14 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 One, such as Figure 14 As shown, the fifth switch module includes a ninth diode AD9, and the sixth switch module includes a tenth diode AD10.

[0159] Combined with scenario examples, such as Figure 14 As shown, the feed node can be marked as 23. When the operating voltage of the ninth diode AD9 reaches a preset turn-on voltage, the ninth diode AD9 is turned on, and at this time, the feed node 23 and the first triangular patch resonator are turned on. Similarly, when the operating voltage of the tenth diode AD10 reaches a preset turn-on voltage, the tenth diode AD10 is turned on, and at this time, the feed node 23 and the second triangular patch resonator are turned on.

[0160] Based on the broadband low-profile reconfigurable indoor antenna provided in this example, the working states of the ninth diode AD9 and the tenth diode AD10 can be controlled by controlling the working voltages of the ninth diode AD9 and the tenth diode AD10.

[0161] Optional, Figure 15 Schematic diagram of the structure of the broadband low-profile reconfigurable indoor antenna provided in this application Figure 10 Second, such as Figure 15 As shown, the broadband low-profile reconfigurable indoor antenna further includes: a ninth and a tenth microstrip line 24 and 25;

[0162] The ninth microstrip line 24 is connected to the ninth diode AD9 and the first triangular patch resonator respectively;

[0163] The tenth microstrip line 25 is connected to the tenth diode AD10 and the second triangular patch resonator respectively.

[0164] In this scenario example, after the ninth diode AD9 is turned on, the RF signal can be transmitted from the feed node 23 to the first triangular patch resonator via the ninth microstrip transmission line 24. After the tenth diode AD10 is turned on, the RF signal can be transmitted from the feed node 23 to the second triangular patch resonator via the tenth microstrip line 25.

[0165] The broadband, low-profile, reconfigurable indoor antenna provided in this example can transmit radio frequency signals through the ninth microstrip transmission line 24 and the tenth microstrip line 25 .

[0166] Figure 16 Schematic diagram of the size parameters of a broadband low-profile reconfigurable indoor antenna as an example, Figure 16 As shown in the figure, w1=63mm, w2=0.8mm, w3=3mm, w4=1.1mm, w5=1.8mm, L1=16.1mm, L2=26.8mm, L3=13mm, L4=8.22mm, L5=9.6mm, L6=8.4mm, L7=30.2mm, and L8=12mm. It is worth mentioning that L8 can be changed by controlling the number of metal holes or the relative distance between individual metal holes. The size of L8 can control the coupling strength between the two resonant modes.

[0167] The broadband low-profile indoor antenna with reconfigurable radiation pattern provided in the embodiment of the present application can flexibly switch the radiation units to be turned on through multiple switch modules, and can flexibly adjust the radiation direction according to the orientation of the interference source, thereby increasing indoor communication efficiency.

[0168] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A broadband low-profile reconfigurable indoor antenna, characterized in that: include: A dielectric substrate, first and second triangular patch resonators, first to fourth radiating elements, first to sixth switch modules, and a metal ground, wherein the dielectric substrate includes a feeding node, the metal ground includes a feeding metal hole, the feeding node is connected to a coaxial probe passing through the feeding metal hole, and the first and second triangular patch resonators are isosceles right triangle patch resonators; The first switch module is connected to the first triangular patch resonator and the first radiation unit respectively, and is used to control the conduction between the two; The second switch module is connected to the first triangular patch resonator and the second radiating unit respectively, for controlling conduction between the two; The third switch module is connected to the second triangular patch resonator and the third radiation unit respectively, and is used to control the conduction between the two; The fourth switch module is connected to the second triangular patch resonator and the fourth radiation unit respectively, and is used to control the conduction between the two; The fifth switch module is connected to the feeding node and the first triangular patch resonator respectively, and is used to control the conduction between the two; A sixth switch module is connected to the feeding node and the second triangular patch resonator respectively, and is used to control conduction between the two; The first and second triangular patch resonators are respectively connected to the metal ground.

2. The broadband low-profile reconfigurable indoor antenna according to claim 1, characterized in that: The first triangular patch resonator includes first to third metal rows of holes, which are used to connect the first triangular patch resonator to the metal ground, wherein the first metal row of holes is located at the first bottom corner of the first triangular patch resonator and is parallel to the first right-angled side of the first triangular patch resonator, the third metal row of holes is located at the second bottom corner of the first triangular patch resonator and is parallel to the second right-angled side of the first triangular patch resonator, and the second metal row of holes is located at the top corner of the first triangular patch resonator and is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the first triangular patch resonator; The second triangular patch resonator includes fourth to sixth metal rows of holes for connecting the second triangular patch resonator to the metal ground, wherein the fourth metal row of holes is located at the first bottom corner of the second triangular patch resonator and is parallel to the first right-angled side of the second triangular patch resonator, the sixth metal row of holes is located at the second bottom corner of the second triangular patch resonator and is parallel to the second right-angled side of the second triangular patch resonator, and the fifth metal row of holes is located at the top corner of the second triangular patch resonator. The second triangular patch resonator is composed of two groups of vertically arranged metal rows of holes, and the two groups of vertically arranged metal rows of holes are respectively parallel to the first right-angled side and the second right-angled side of the second triangular patch resonator.

3. The broadband low-profile reconfigurable indoor antenna according to claim 2, characterized in that: The first radiation unit includes first and second radiation arms, and the first switch module includes first and second diodes; A first diode is connected to the first triangular patch resonator and the first radiation arm respectively, for controlling conduction between the two; The second diode is connected to the first triangular patch resonator and the second radiation arm respectively, and is used to control the conduction between the two.

4. The broadband low-profile reconfigurable indoor antenna according to claim 3, characterized in that: The first radiation arm includes a first radiation branch and a first microstrip transmission line, and the second radiation arm includes a second radiation branch and a second microstrip transmission line; The first microstrip transmission line is connected to the first diode and the first radiation branch respectively; The second microstrip transmission line is connected to the second diode and the second radiation branch respectively.

5. The broadband low-profile reconfigurable indoor antenna according to claim 4, characterized in that: The second radiation unit includes third and fourth radiation arms, and the second switch module includes third and fourth diodes; A third diode is connected to the first triangular patch resonator and the third radiation arm respectively, for controlling conduction between the two; The fourth diode is connected to the first triangular patch resonator and the fourth radiation arm respectively, and is used for conduction between the two.

6. The broadband low-profile reconfigurable indoor antenna according to claim 5, characterized in that: The third radiation arm includes a third radiation branch and a third microstrip transmission line, and the fourth radiation arm includes a fourth radiation branch and a fourth microstrip transmission line; The third microstrip transmission line is connected to the third diode and the third radiation branch respectively; The fourth microstrip transmission line is connected to the fourth diode and the fourth radiation branch respectively.

7. The broadband low-profile reconfigurable indoor antenna according to claim 6, characterized in that: The third radiation unit includes fifth and sixth radiation arms, and the third switch module includes fifth and sixth diodes; a fifth diode connected to the second triangular patch resonator and the fifth radiation arm respectively, for controlling conduction between the two; The sixth diode is connected to the second triangular patch resonator and the sixth radiation arm respectively, and is used to control conduction between the two.

8. The broadband low-profile reconfigurable indoor antenna according to claim 7, characterized in that: The fifth radiation arm includes a fifth radiation branch and a fifth microstrip transmission line, and the sixth radiation arm includes a sixth radiation branch and a sixth microstrip transmission line; The fifth microstrip transmission line is connected to the fifth diode and the fifth radiation branch respectively; The sixth microstrip transmission line is connected to the sixth diode and the sixth radiation branch respectively.

9. The broadband low-profile reconfigurable indoor antenna according to claim 8, characterized in that: The fourth radiation unit includes seventh and eighth radiation arms, and the fourth switch module includes seventh and eighth diodes; a seventh diode connected to the second triangular patch resonator and the seventh radiation arm respectively, for controlling conduction between the two; The eighth diode is connected to the second triangular patch resonator and the eighth radiation arm respectively, and is used to control conduction between the two.

10. The broadband low-profile reconfigurable indoor antenna according to claim 9, characterized in that: The seventh radiation arm includes a seventh radiation branch and a seventh microstrip transmission line, and the eighth radiation arm includes an eighth radiation branch and an eighth microstrip transmission line; The seventh microstrip transmission line is connected to the seventh diode and the seventh radiation branch respectively; The eighth microstrip transmission line is connected to the eighth diode and the eighth radiation branch respectively.

11. The broadband low-profile reconfigurable indoor antenna according to claim 10, characterized in that: The fifth switch module includes a ninth diode, and the sixth switch module includes a tenth diode.

12. The broadband low-profile reconfigurable indoor antenna according to claim 11, characterized in that: Also includes: the ninth and tenth microstrip lines; The ninth microstrip line is connected to the ninth diode and the first triangular patch resonator respectively; The tenth microstrip line is connected to the tenth diode and the second triangular patch resonator respectively.

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