Communication antenna

Abstract

The utility model relates to the technical field of antennas, in particular to a communication antenna. The embodiment of the utility model provides a communication antenna, which comprises a substrate, a ceramic substrate and a spiral tube, and is characterized in that the substrate is provided with a first side surface and a second side surface which are oppositely arranged along the thickness direction of the substrate; the ceramic substrate is arranged on the first side face, the ceramic substrate is electrically connected with the substrate, the ceramic substrate is provided with a radiation unit used for transmitting signals, and the dielectric constant of the ceramic substrate is 130-150; the spiral pipe is arranged on the first side face, and a radiation arm is spirally wound on the spiral pipe and used for receiving signals. The effects of reducing the antenna size and reducing signal interference are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to a communication antenna. BACKGROUND

[0002] The Beidou short message function supports two-way information transmission and is widely used in emergency communication in areas without ground network coverage. The antenna needs to meet the requirements of low elevation angle coverage, anti-interference and miniaturization, but there are still the following problems: the traditional ceramic patch antenna is large in size and difficult to integrate into portable devices, resulting in a large size of the transmitting antenna; signal interference is easy to occur when the transmitting and receiving antennas are co-located, especially when the same type of antenna structure is used for transmitting and receiving antennas. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a communication antenna which achieves the effects of reducing the size of the antenna and reducing signal interference.

[0004] In order to achieve the above purpose, the main technical scheme adopted by the present application comprises:

[0005] The present application provides a communication antenna, which comprises a substrate, a ceramic substrate and a spiral tube. Along the thickness direction of the substrate, the substrate has a first side and a second side arranged oppositely. The ceramic substrate is arranged on the first side and electrically connected to the substrate. The ceramic substrate is provided with a radiation unit for transmitting signals, wherein the dielectric constant of the ceramic substrate is 130-150. The spiral tube is arranged on the first side, and the spiral tube is spirally wound with a radiation arm for receiving signals.

[0006] The communication antenna provided by the present application adopts a ceramic substrate with a dielectric constant of 130-150. Under the condition that the output frequency is constant, the ceramic substrate with a larger dielectric constant can reduce the wavelength of electromagnetic waves, thereby reducing the size of the ceramic substrate. The ceramic substrate and the spiral tube are both arranged on the first side of the substrate, thereby reducing the overall size of the communication antenna.

[0007] The ceramic substrate is provided with a radiation unit for transmitting signals, and the spiral tube is wound with a radiation arm for receiving signals. By using different antenna structures and radiation characteristics, the coupling between the transmitting signal antenna and the receiving signal antenna can be reduced, thereby reducing signal interference.

[0008] Optionally, the spiral tube has a first end close to the substrate and a second end away from the substrate, and the radiation arm comprises a first segment extending from the first end to the second end.

[0009] In the above scheme, the first segment extends from the first end to the second end in a spiral winding manner along the outer circumferential surface of the spiral tube, so that the radiation arm has right-handed circular polarization receiving characteristics.

[0010] Optionally, the radiating arm further comprises a second section extending along the circumference of the helical tube, and the second section is connected to the first section away from the substrate.

[0011] In the above scheme, the second section is connected to the first section and extends along the circumference of the helical tube to extend the length of the radiating arm, so that the length of the radiating arm can support the frequency in the S-band to resonate.

[0012] Optionally, the radiating arm further comprises a second section extending along the circumference of the helical tube, and the second section is connected to the first section away from the substrate.

[0013] In the above scheme, the second section is connected to the first section and extends along the circumference of the helical tube to extend the length of the radiating arm, so that the length of the radiating arm can support the frequency in the S-band to resonate.

[0014] Optionally, the sum of the length of the first section and the length of the second section is 1 / 4 of the wavelength of the receiving antenna.

[0015] In the above scheme, the sum of the length of the first section and the length of the second section is the total length of the radiating arm, and the total length of the radiating arm is 1 / 4 of the wavelength of the receiving antenna, so that the receiving antenna has a good radiation pattern coverage in the required frequency band, and the low-elevation gain is high, and the antenna non-circularity is good.

[0016] Optionally, along the first direction, the radiating unit has oppositely arranged first and second side walls, along the second direction, the radiating unit has third and fourth side walls, the first and fourth side walls are connected, the second and third side walls are connected, the first and third side walls are connected through a fifth side wall, the second and fourth side walls are connected through a sixth side wall, the first and third side walls are both arranged at an angle with the fifth side wall, and the second and fourth side walls are both arranged at an angle with the sixth side wall, wherein the thickness direction of the substrate, the first direction and the second direction are perpendicular to each other.

[0017] In the above scheme, the first and third side walls are both arranged at an angle with the fifth side wall, and the second and fourth side walls are both arranged at an angle with the sixth side wall, so as to change the current distribution on the radiating unit to realize the left-handed circularly polarized radiation characteristic.

[0018] Optionally, the communication antenna further comprises a feeding needle, the feeding needle is electrically connected with the ceramic substrate and the feeding unit, the minimum distance between the feeding needle and the first sidewall is equal to the minimum distance between the feeding needle and the second sidewall, and the minimum distance between the feeding needle and the third sidewall is greater than the minimum distance between the feeding needle and the fourth sidewall.

[0019] In the above scheme, along the first direction, the feeding needle is located at the center of the radiation unit, and along the second direction, the feeding needle is closer to the fourth sidewall than to the third sidewall, so as to change the current distribution on the radiation unit to achieve circularly polarized radiation characteristics, while being able to achieve 50 ohm resonance matching, reduce signal reflection, and reduce the standing wave ratio.

[0020] Optionally, the difference between the minimum distance between the feeding needle and the third sidewall and the minimum distance between the feeding needle and the fourth sidewall is 0.6mm-1.6mm.

[0021] In the above scheme, the third sidewall and the fourth sidewall have a center line therebetween, and the distance between the feeding needle and the center line is 0.3mm-0.8mm, so as to change the current distribution on the radiation unit to achieve circularly polarized radiation characteristics, while being able to achieve 50 ohm resonance matching, reduce signal emission, and reduce the standing wave ratio, so that the standing wave ratio is less than 1.5.

[0022] Optionally, the number of the radiation arms is four, and the four radiation arms are arranged at intervals along the circumference of the spiral tube.

[0023] In the above scheme, a plurality of radiation arms are arranged at intervals along the circumference of the spiral tube, and the four radiation arms have a phase difference of 90 degrees, so as to improve the circular polarization characteristics of the antenna.

[0024] Optionally, the substrate is provided with a feeding unit, and along the axial direction of the spiral tube, the projection of the feeding unit falls within the projection of the spiral tube, and the feeding unit is electrically connected with the radiation arm.

[0025] In the above scheme, along the axial direction of the spiral tube, the projection of the feeding unit on the substrate falls within the projection of the spiral tube on the substrate, so as to reduce the space occupied by the feeding unit on the substrate.

[0026] Optionally, the dielectric constant of the spiral tube is 2.65-3.5.

[0027] In the above scheme, the spiral tube is made of a material with a dielectric constant, which can effectively reduce the size of the spiral tube, so as to realize the miniaturization of the radiation antenna. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 It is a perspective structural schematic diagram of the communication antenna of the present application.

[0030] Figure 2 It is a perspective structural schematic diagram of the communication antenna of the present application.

[0031] Figure 3 It is a structural schematic diagram of the communication antenna of the present application.

[0032] Figure 4 It is a structural schematic diagram of the spiral tube in another embodiment of the present application.

[0033]

Explanation of reference signs

[0034] 1: substrate; 11: first side; 12: second side;

[0035] 2: ceramic substrate;

[0036] 3: radiating unit; 31: first side wall; 32: second side wall; 33: third side wall; 34: fourth side wall; 35: fifth side wall; 36: sixth side wall;

[0037] 4: spiral tube; 41: first end; 42: second end;

[0038] 5: radiating arm; 51: first section; 52: second section;

[0039] 6: feed pin;

[0040] 7: ground arm;

[0041] A: first direction; B: second direction; C: thickness direction of the substrate. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the description and claims of the application herein, as well as the abstract, drawings and appendices, utilize a variety of terms to connote different entities that are understood to one of ordinary skill in the art. However, specific embodiments of the present application can employ terms that can have specialized meanings in certain arts and / or may

[0044] Reference throughout this application to "embodiments" means embodiments described in connection with the embodiments as described in the application. The appearance of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described in the application can be combined with any of the other embodiments.

[0045] In the description of the application, it is necessary to note that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0046] The term "and / or" in the application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that there are three kinds of situations: A alone, A and B exist together, and B alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0047] The "multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] The antenna needs to meet the requirements of low elevation angle coverage, anti-interference and miniaturization, but the antenna still has the following problems: the size of the transmitting antenna is too large: the volume of the traditional ceramic patch antenna is large, which is difficult to integrate into a portable device, resulting in the size of the transmitting antenna being too large; the gain of the planar microstrip antenna is not uniform when receiving low-elevation-angle signals, and the gain is very low at some angles, resulting in poor directivity of the receiving antenna; the transmitting is left-handed circular polarized signal, and the receiving is right-handed circular polarized signal, and a single structure cannot cover the Beidou transmitting and receiving frequency bands, resulting in poor multi-band compatibility; when the transmitting and receiving antennas are co-located, signal interference is easy to occur, especially when the transmitting and receiving antennas use the same type of antenna structure.

[0049] The embodiment of the present application provides a communication antenna, referring to Figures 1 to 4 The communication antenna comprises a substrate 1, a ceramic substrate 2 and a spiral tube 4. The substrate 1 has a first side 11 and a second side 12 arranged oppositely along the thickness direction C of the substrate 1. The ceramic substrate 2 is arranged on the first side 11 and electrically connected with the substrate 1. The ceramic substrate 2 is provided with a radiation unit 3 for transmitting signals, wherein the dielectric constant of the ceramic substrate 2 is 130-150. The spiral tube 4 is arranged on the first side 11, and the spiral tube 4 is spirally wound with a radiation arm 5 for receiving signals.

[0050] The communication antenna provided by the embodiment of the present application adopts the ceramic substrate 2 with a dielectric constant of 130-150. Under the condition that the output frequency is constant, the ceramic substrate 2 with a larger dielectric constant can reduce the wavelength of electromagnetic waves, thereby reducing the size of the ceramic substrate 2. The ceramic substrate 2 and the spiral tube 4 are both arranged on the first side 11 of the substrate 1, thereby reducing the overall size of the communication antenna.

[0051] The dielectric constant of the ceramic substrate 2 can be 130, 132, 135, 138, 140, 142, 145, 146, 148 or 150, etc.

[0052] The ceramic substrate 2 is provided with the radiation unit 3 for transmitting signals, and the ceramic substrate 2 and the radiation unit serve as a transmitting antenna. The spiral tube 4 is wound with the radiation arm 5 for receiving signals, and the spiral tube 4 and the radiation arm 5 serve as a receiving antenna. Different antenna structures and radiation characteristics are adopted, which can reduce the coupling between the transmitting signal antenna and the receiving signal antenna, thereby reducing signal interference.

[0053] The substrate 1 can be a circuit board, which provides electrical signals for the radiation unit 3 and the radiation arm 5.

[0054] Optionally, referring to Figure 1 and Figure 4 The spiral tube 4 has a first end 41 close to the substrate 1 and a second end 42 away from the substrate 1, and the radiation arm 5 comprises a first section 51 extending from the first end 41 to the second end 42.

[0055] The first end 41 of the spiral tube 4 is connected to the substrate 1, and the radiation arm 5 is wound on the spiral tube 4, the radiation arm 5 comprises a first section 51 extending in a spiral manner along the outer circumferential surface of the spiral tube 4 from the first end 41 to the second end 42, so that the radiation arm 5 has a right-handed circular polarization receiving characteristic.

[0056] In one embodiment, the surface of the radiation arm 5 is electroplated with copper, and the spiral tube 4 has a cylindrical structure, so that the spiral tube 4 receiving antenna supports Beidou receiving S-band circular polarization receiving characteristics.

[0057] In one embodiment, the second end of the radiation tube 4 is provided with a limiting portion, which protrudes radially along the radiation tube, that is, the diameter of the limiting portion is greater than the diameter of the spiral tube 4, which can reduce the contact between the radiation arm 5 on the radiation tube 4 and the shell, thereby affecting the performance of the antenna.

[0058] Optionally, referring to Figure 4 , the radiation arm 5 further comprises a second section 52 extending along the circumferential direction of the spiral tube 4, the second section 52 is connected to the end of the first section 51 away from the substrate 1,

[0059] The second section 52 is connected to the first section 51 and extends along the circumferential direction of the spiral tube 4 to extend the length of the radiation arm 5, so that the overall length of the radiation arm 5 is increased and the occupied height is reduced, thereby reducing the size of the spiral tube 4 receiving antenna, so that the overall height of the communication antenna is miniaturized. Further increase the length of the radiation arm 5, so that the length of the radiation arm 5 can better support the frequency resonance in the S-band, thereby improving the transmission efficiency.

[0060] In yet another embodiment, the spiral tube 4 is further provided with a grounding arm 7, the grounding arm 7 is arranged at the first end of the spiral tube 4, and one end of the grounding arm 7 is connected to the side of the radiation arm 5 close to the substrate 1, and the other end of the grounding arm 7 is connected to the substrate 1. The grounding arm 7 is grounded to provide a current loop for the radiation arm 5. When the antenna is working, the current flows from the radiation arm 5 to the grounding arm 7 to form a complete current path. The presence of the grounding arm 7 can equivalently increase the electrical length of the antenna without actually increasing the physical length of the radiation arm 5, which is equivalent to reducing the total length of the radiation arm 5. At the same time, the grounding arm 7 can adjust the current distribution and input impedance to realize impedance matching between the antenna and the feeder, and improve the radiation efficiency.

[0061] Optionally, the sum of the length of the first section 51 and the length of the second section 52 is 1 / 4 of the wavelength of the receiving antenna.

[0062] The sum of the length of the first section 51 and the length of the second section 52 is the total length of the radiating arm 5, and the total length of the radiating arm 5 is 1 / 4 of the wavelength of the receiving antenna, so that the receiving antenna has a good radiation pattern coverage in the required frequency band, and the low elevation gain is high, and the antenna non-circularity is good.

[0063] Optionally, referring to Figure 1 and Figure 3 , along the first direction A, the radiation unit 3 has oppositely arranged first and second side walls 31 and 32, along the second direction B, the radiation unit 3 has third and fourth side walls 33 and 34, the first side wall 31 and the fourth side wall 34 are connected, the second side wall 32 and the third side wall 33 are connected, the first side wall 31 and the third side wall 33 are connected through the fifth side wall 35, the second side wall 32 and the fourth side wall 34 are connected through the sixth side wall 36, the first side wall 31 and the third side wall 33 are both arranged at an angle with the fifth side wall 35, and the second side wall 32 and the fourth side wall 34 are both arranged at an angle with the sixth side wall 36, wherein the thickness direction C of the substrate 1, the first direction A and the second direction B are perpendicular to each other in pairs.

[0064] Specifically, the radiation unit 3 is square, the first side wall 31 is parallel to the second side wall 32, and the third side wall 33 is parallel to the fourth side wall 34. The radiation unit 3 has a cut corner in the direction of one diagonal, the first side wall 31 and the third side wall 33 have a first cut corner therebetween, and the second side wall 32 and the fourth side wall 34 have a second cut corner therebetween. The first cut corner forms the fifth side wall 35, and the second cut corner forms the sixth side wall 36. The two oppositely arranged cut corners can change the current distribution on the radiation unit, thereby realizing the left-handed circular polarization characteristic.

[0065] That is, the first side wall 31 and the third side wall 33 are both arranged at an angle with the fifth side wall 35, and the second side wall 32 and the fourth side wall 34 are both arranged at an angle with the sixth side wall 36, thereby changing the current distribution on the radiation unit 3 to realize the left-handed circular polarization radiation characteristic.

[0066] In one specific embodiment, along the first direction A, the size of the radiation unit 3 is smaller than the size of the ceramic substrate 2, and along the second direction B, the size of the radiation unit 3 is smaller than the size of the ceramic substrate 2. For example, along the first direction A, the spacing between the opposite two side edges of the radiation unit 3 and the edges of the ceramic substrate 2 is 1mm, and along the second direction B, the spacing between the opposite two side edges of the radiation unit 3 and the edges of the ceramic substrate 2 is 1mm. If the size of the ceramic substrate along the first direction A is 10mm, and along the second direction B, the size of the ceramic substrate is 10mm, then along the first direction A, the size of the radiation unit 3 is 8mm, and along the second direction B, the size of the radiation unit 3 is 8mm.

[0067] Optionally, referring to Figures 1 to 3The communication antenna further comprises a feed pin 6 electrically connected to the ceramic substrate 2 and the feed unit, the minimum distance between the feed pin 6 and the first side wall 31 is equal to the minimum distance between the feed pin 6 and the second side wall 32, and the minimum distance between the feed pin 6 and the third side wall 33 is greater than the minimum distance between the feed pin 6 and the fourth side wall 34.

[0068] The feed pin 6 is connected to the substrate 1 by welding and draws signals through the microstrip on the substrate 1. The single feed pin 6 is used to provide excitation current for the radiating unit 3, so that the radiating unit 3 can generate electromagnetic wave radiation. The fifth side wall 35 and the sixth side wall 36 of the radiating unit 3 are formed by cutting corners, the feed pin 6 is located at the center of the radiating unit 3 along the first direction A, and the feed pin 6 is closer to the fourth side wall than the third side wall along the second direction B, so as to change the current distribution on the radiating unit 3 to realize circularly polarized radiation characteristics, while realizing 50 ohm resonance matching, reducing signal reflection and reducing the standing wave ratio.

[0069] Optionally, the difference between the minimum distance between the feed pin 6 and the third side wall 33 and the minimum distance between the feed pin 6 and the fourth side wall 34 is 0.6mm-1.6mm. That is, the third side wall 33 and the fourth side wall 34 have a center line therebetween, and the distance between the feed pin 6 and the center line is 0.3mm-0.8mm, so as to change the current distribution on the radiating unit 3 to realize left-handed circularly polarized radiation characteristics, while realizing 50 ohm resonance matching, reducing signal emission, reducing the standing wave ratio, and making the standing wave ratio less than 1.5. Specifically, the third side wall 33 and the fourth side wall 34 have a center line therebetween, and the distance between the feed pin 6 and the center line can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm or 0.8mm, etc.

[0070] Optionally, the four radiating arms 5 are arranged at intervals along the circumference of the spiral tube 4. Each radiating arm 5 corresponds to a grounding arm 7. The four radiating arms 5 are arranged at intervals along the circumference of the spiral tube 4, and each radiating arm 5 has a certain phase difference therebetween to improve the circular polarization characteristics of the antenna. Specifically, the four radiating arms 5 are distributed at equal intervals along the circumference of the spiral tube 4, and the phase difference between adjacent two radiating arms 5 is 90°, and the signals output by the adjacent two radiating arms 5 have a phase difference of 90°, so as to improve the circular polarization characteristics of the antenna.

[0071] Specifically, the radiation arms include first, second, third and fourth radiation arms in sequence, the first and second radiation arms have a 90° phase difference, the second and third radiation arms have a 90° phase difference, and the third and fourth radiation arms have a 90° phase difference. The phase output by the first radiation arm is 0°, the phase output by the second radiation arm is 90°, the phase output by the third radiation arm is 180°, and the phase output by the fourth radiation arm is 270°.

[0072] Optionally, a feeding unit is arranged on the substrate 1, and a projection of the feeding unit along an axial direction of the spiral tube 4 falls within a projection of the spiral tube 4. The feeding unit is electrically connected with the radiation arms 5. A projection of the feeding unit on the substrate 1 along the axial direction of the spiral tube 4 falls within a projection of the spiral tube 4 on the substrate 1, so that the feeding unit occupies less space on the substrate 1, and the antenna is conducive to integration with other circuits. The feeding unit is a 1-to-4 power-dividing phase-shifting feeding network, and the right-handed circularly polarized gain of the antenna is improved.

[0073] The four spiral arms are connected with the feeding unit, and the four spiral arms have a 90° phase difference, so that the circularly polarized characteristics of the antenna are improved.

[0074] Optionally, the dielectric constant of the spiral tube 4 is 2.65-3.5. The spiral tube 4 is made of a material with a dielectric constant, so that the size of the spiral tube 4 is effectively reduced, and the radiation antenna is miniaturized.

[0075] Preferably, the dielectric constant of the spiral tube 4 is 2.65, and the spiral tube 4 is made of PPO material, so that the size of the spiral tube 4 is effectively reduced, and the radiation antenna is miniaturized.

[0076] In the communication antenna, the substrate 1 is a circuit board, the circuit board is provided with the ceramic substrate 2 and the spiral tube 4. A square ceramic substrate 2 with a size of 10mm*10mm*4mm is used as a transmitting antenna, the dielectric constant of the ceramic substrate 2 is 130, the surface of the ceramic substrate 2 is etched with a radiation unit 3 with a cut corner, a single feeding needle 6 structure is used, the transmitting antenna supports the Beidou transmitting L-band left-handed circularly polarized radiation characteristics, and the center frequency can reach 1616MHz. By controlling the position of the feeding needle 6, the feeding needle 6 is located at the center of the first direction A of the radiation unit 3, and the distance between the feeding needle 6 and the center of the second direction B of the radiation unit 3 is 0.3mm-0.8mm, 50 ohm resonance matching is realized, and the standing wave ratio is less than 1.5.

[0077] A cylindrical spiral tube 4 with a diameter of 15mm and a length of 19mm is used as a receiving antenna, the surface of the radiation arm 5 is plated with copper, the receiving antenna supports the Beidou receiving S-band right-handed circularly polarized receiving characteristics, and the center frequency can reach 2492MHz. The spiral tube 4 is made of PPO material with a dielectric constant of 2.65, and the size of the antenna is effectively miniaturized.

[0078] The radiation arms 5 are four, equidistantly distributed along the circumference of the helical tube 4, improving the circular polarization characteristics of the antenna. The helical arms have a second section 52 extending along the circumference of the helical tube 4 at the second end 42 of the helical tube 4, to increase the length of the radiation arms 5 while reducing the length of the radiation arms 5 along the axis of the helical tube 4, thereby reducing the height of the helical tube 4, and further reducing the overall height of the communication antenna, to achieve miniaturization of the communication antenna.

[0079] The feed unit is a 1-to-4 power-dividing phase-shifting feed network, capable of improving the right-handed circular polarization gain of the antenna. Moreover, the feed unit falls within the projection of the helical tube 4 on the substrate 1, reducing the space occupied by the feed unit on the circuit board.

[0080] The ceramic substrate 2 transmitting antenna has the characteristics of high zenith gain, low low-elevation gain, and high transmission success rate. The helical tube 4 receiving antenna has the characteristics of high low-elevation gain and wider receiving directivity. Different radiation characteristics can reduce the coupling between the ceramic substrate 2 transmitting antenna and the helical tube 4 receiving antenna, and reduce the signal interference between the ceramic substrate 2 transmitting antenna and the helical tube 4 receiving antenna.

[0081] The application utilizes the high dielectric property of the ceramic substrate 2 to reduce the size of the transmitting antenna, and utilizes the helical antenna designed by the helical tube 4 made of PPO material with a certain dielectric constant to reduce the size of the receiving antenna. The receiving antenna and the transmitting antenna are both arranged on the first side 11 of the substrate 1 and are horizontally laid out, reducing the overall space occupied by the communication antenna.

[0082] The transmitting antenna is welded on the bottom circuit board through the single-feed needle 6, and the signal is led out through the microstrip on the circuit board. The receiving antenna leads out the signal through the feed unit on the circuit board, and the signal is led out to the desired position through the microstrip on the circuit board, which is conducive to the integration of the communication antenna and the back-end calculation module, thereby realizing the miniaturization of the overall device.

[0083] It should also be noted that the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0084] The various embodiments described in this specification are described using a numbering of embodiments approach: these are each treated as independent embodiments or else groups of embodiments. Each of these embodiments can be combined with any other embodiment(s) described herein. All combinations are considered to be part of the present application.

[0085] The above description is implemented only as an example of the present application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0086] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A communication antenna, characterized in that, include: A substrate, along the thickness direction of the substrate, has a first side surface and a second side surface disposed opposite to each other; A ceramic substrate is disposed on the first side and is electrically connected to the substrate. The ceramic substrate is provided with a radiating unit for transmitting signals, wherein the dielectric constant of the ceramic substrate is 130 to 150. A spiral tube is provided on the first side, and a radiating arm is spirally wound on the spiral tube. The radiating arm is used to receive signals.

2. The communication antenna according to claim 1, characterized in that, The spiral tube has a first end close to the substrate and a second end away from the substrate, and the radiating arm includes a first segment extending from the first end to the second end.

3. The communication antenna according to claim 2, characterized in that, The radiating arm further includes a second segment extending circumferentially along the helical tube, the second segment being connected to the end of the first segment away from the substrate.

4. The communication antenna according to claim 3, characterized in that, The sum of the lengths of the first segment and the second segment is 1 / 4 of the operating wavelength of the receiving antenna.

5. The communication antenna according to claim 1, characterized in that, Along a first direction, the radiating unit has a first sidewall and a second sidewall disposed opposite to each other. Along a second direction, the radiating unit has a third sidewall and a fourth sidewall. The first sidewall and the fourth sidewall are connected. The second sidewall is connected to the third sidewall. The first sidewall and the third sidewall are connected by a fifth sidewall. The second sidewall and the fourth sidewall are connected by a sixth sidewall. The first sidewall and the third sidewall are both set at an angle to the fifth sidewall. The second sidewall and the fourth sidewall are both set at an angle to the sixth sidewall. The thickness direction of the substrate, the first direction, and the direction along the second direction are all perpendicular to each other.

6. The communication antenna according to claim 5, characterized in that, It also includes a power supply pin, which is electrically connected to the ceramic substrate and the power supply unit. The minimum distance between the power supply pin and the first sidewall is equal to the minimum distance between the power supply pin and the second sidewall, and the minimum distance between the power supply pin and the third sidewall is greater than the minimum distance between the power supply pin and the fourth sidewall.

7. The communication antenna according to claim 6, characterized in that, The difference between the minimum distance between the feeding pin and the third sidewall and the minimum distance between the feeding pin and the fourth sidewall is 0.6 mm to 1.6 mm.

8. The communication antenna according to any one of claims 1-4, characterized in that, There are four radiating arms, arranged at intervals along the circumference of the spiral tube.

9. The communication antenna according to claim 1, characterized in that, The substrate is provided with a power feeding unit. Along the axial direction of the spiral tube, the projection of the power feeding unit falls within the projection of the spiral tube. The power feeding unit is electrically connected to the radiating arm.

10. The communication antenna according to claim 1, characterized in that, The dielectric constant of the spiral tube is 2.65 to 3.5.

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