Three-in-one antenna applied to interphone

Abstract

The utility model discloses a three-in-one antenna applied to an interphone, which comprises an antenna support, the antenna support comprises a plane shell and a support column extending downwards from one side of the plane shell, the bottom surface of the support column is provided with a grounding part and a feed part, the outer side surface of the support column is provided with a communication part, and the communication part is provided with a power supply; the communication part connects the grounding part and the feed part and extends to the upper surface of the planar shell, the upper surface of the planar shell is also provided with a radiation unit, a first gap is arranged between the communication part and the radiation unit, and the communication part carries out coupled feed to the radiation unit through the first gap. Compared with the prior art, the three-in-one antenna claimed by the application utilizes the coupling feed of the first slot and / or the second slot, fully utilizes the limited size, improves the efficiency and gain of the antenna to the greatest extent, and widens the bandwidth of the antenna; the structure is simple, circuits are concise, and production is facilitated; resonance only exists in a needed frequency band range, no clutter exists, and the anti-interference capacity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a three-in-one antenna used in walkie-talkies. Background Art

[0002] The three-in-one antenna combines three separate antennas - GNSS antenna, BT antenna and WiFi antenna - to achieve multiple frequency band communications through one antenna, thereby realizing multiple wireless communication functions. The three-in-one antenna generally used in wireless communication equipment is often based on the IFA / PIFA / LOOP form, with multi-branch routing or added parasitics to meet the requirements of multiple frequency bands.

[0003] However, multi-branch routing will lead to complex antenna structure. For example, arc-shaped branches make drawing difficult and process production is prone to greater deviation. Generally speaking, adding parasitic branches will not only lead to poor performance, but also increase the size of the antenna and increase costs. In addition, the bandwidth of IFA antenna is narrow, while the bandwidth of PIFA antenna is limited by the height of the bracket. However, in general machines, the height of the bracket is limited, which leads to its narrow bandwidth. The bandwidth of LOOP antenna is generally relatively wide, but its efficiency is generally lower than other forms.

[0004] Therefore, there is an urgent need for a three-in-one antenna with simple structure, small size, high gain and high efficiency. Utility Model Content

[0005] Based on the above technical problems, an embodiment of the present application provides a three-in-one antenna applied to a walkie-talkie, which can make full use of limited size, maximize the efficiency and gain of the antenna, and expand the antenna bandwidth.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes: an antenna bracket, the antenna bracket includes a planar shell and a support column extending downward on one side of the planar shell, a grounding part and a feeding part are provided on the bottom surface of the support column, and a connecting part is provided on the outer side surface of the support column. The connecting part connects the grounding part and the feeding part and extends to the upper surface of the planar shell. A radiation unit is also provided on the upper surface of the planar shell, and a first gap is provided between the connecting part and the radiation unit, and the connecting part couples and feeds the radiation unit through the first gap.

[0007] Furthermore, the radiation unit includes a low-frequency radiation arm and a high-frequency radiation arm connected to each other on the left and right, and a first cut-off gap is provided between the high-frequency radiation arm and the connecting portion.

[0008] Furthermore, the shape of the first gap is an inverted U shape; the width of the first gap does not exceed 0.5 mm.

[0009] Furthermore, a coupling and feeding intermediate sheet is provided on the upper surface of the planar shell. The coupling and feeding intermediate sheet is located between the first gap and the connecting portion, and a cut-off second gap is provided between the coupling and feeding intermediate sheet and the connecting portion.

[0010] Furthermore, a coupling portion is provided on the connecting portion on the upper surface of the planar shell, and the coupling portion couples and feeds electricity to other portions through the first slit and the second slit.

[0011] Furthermore, the shape of the second gap is U-shaped; the width of the second gap does not exceed 0.5 mm.

[0012] Furthermore, the low-frequency radiation arm is L-shaped.

[0013] Furthermore, the high-frequency radiation arm includes a first high-frequency tuning coupling arm and a second high-frequency tuning coupling arm, a third gap is provided between the first high-frequency tuning coupling arm and the second high-frequency tuning coupling arm, and the third gap is linear.

[0014] The beneficial effects of the utility model are:

[0015] The utility model utilizes the first slot and / or the second slot to realize coupling feeding of the radiating unit, fully utilizes the limited size, maximizes the efficiency and gain of the antenna, and widens the antenna bandwidth; the overall structure of the antenna is simple, the circuit is concise, and it is conducive to production. It only resonates within the required frequency band, has no clutter, and has strong anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure in which a three-in-one antenna is placed on a walkie-talkie in the first embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of a three-in-one antenna in the first embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of another angle of the three-in-one antenna in the first embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure in which a three-in-one antenna is placed on a walkie-talkie in the second embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the overall structure of a three-in-one antenna in the second embodiment of the utility model;

[0021] Figure 6 This is a schematic structural diagram of another angle of the three-in-one antenna in the second embodiment of the utility model;

[0022] Figure 7-Figure 8This is an efficiency diagram of a three-in-one antenna in the first embodiment of the utility model;

[0023] Figure 9-10 This is a gain diagram of a three-in-one antenna in the first embodiment of the utility model;

[0024] Figure 11-Figure 12 This is an efficiency diagram of a three-in-one antenna in the second embodiment of the utility model;

[0025] Figure 13-14 This is a gain diagram of a three-in-one antenna in the second embodiment of the present utility model;

[0026] Figure numerals: 1-radiation unit, 2-antenna bracket, 10-grounding part, 20-feeding part, 30-connecting part, 40-low-frequency radiation arm, 50-first high-frequency tuning coupling arm, 60-third slot, 70-second high-frequency tuning coupling arm, 80-first slot, 90-coupling feeding intermediate plate, 100-second slot, 110-coupling place, 201-planar shell, 202-support column DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0028] The embodiment of the present application solves the problem of large antenna size and low efficiency in the prior art by providing a three-in-one antenna for a walkie-talkie. In this embodiment, the direction of the low-frequency radiation arm relative to the high-frequency radiation arm is left, left, left side, and the opposite direction is right, right, right side, right side, and the direction of the plane shell relative to the support column is up, above, upper side, upper end, top, top or top, and the opposite direction is down, below, lower side, lower end, bottom, bottom end or bottom.

[0029] Embodiment 1:

[0030] like Figures 1 to 3As shown, it is the first embodiment of the present application: a three-in-one antenna used in a walkie-talkie, comprising: an antenna bracket 2, the antenna bracket 2 comprises a planar shell 201 and a support column 202 extending downward on one side of the planar shell 201, a grounding portion 10 and a feeding portion 20 are provided on the bottom surface of the support column 202, a connecting portion 30 is provided on the outer side surface of the support column 202, the connecting portion 30 connects the grounding portion 10 and the feeding portion 20, and extends to the upper surface of the planar shell 201, a radiation unit 1 is also provided on the upper surface of the planar shell 201, a first gap 80 is provided between the connecting portion 30 and the radiation unit 1, and the connecting portion 30 couples and feeds the radiation unit 1 through the first gap 80.

[0031] In this embodiment, the antenna bracket 2 supports the entire radiation unit 1 of the LDS, providing relatively good clearance, so that the performance of the antenna is more stable when it is working. The grounding part 10 is connected to the board end ground through the RF board end spring clip, increasing the antenna ground, strengthening the resonance, and thus obtaining better performance. The feeding part 20 directly feeds the connecting part 30 through the RF board end spring clip, and the connecting part 30 connects the grounding part 10 and the feeding part 20, forming a complete current loop at the grounding and feeding ends.

[0032] Specifically, the radiation unit 1 includes a low-frequency radiation arm 40 and a high-frequency radiation arm connected to the left and right. A first gap 80 is provided between the high-frequency radiation arm and the connecting part 30. The connecting part 30 on the upper surface of the planar shell 201 includes a coupling portion 110. Only the coupling portion 110 on the connecting part 30 is coupled and fed to the upper radiation unit 1 through the first gap 80. The first gap 80 completely separates the radiation unit 1 and the connecting part 30. The coupling through the first gap 80 also broadens the bandwidth of the low and high frequency resonance, deepens the resonance, and greatly improves the performance.

[0033] The resonance can also be moved closer to the low frequency by increasing the length or area of ​​the low-frequency radiation arm 40. The larger the radiation area, the better the low-frequency efficiency and gain will be. In addition, the antenna efficiency is proportional to the area. The area of ​​the connecting part 30 can be expanded as much as possible to increase the efficiency of the antenna.

[0034] Preferably, the shape of the first slot 80 is set to be an inverted U-shape, and the shape of the low-frequency radiation arm 40 can be set to be an L-shape; the width of the first slot 80 does not exceed 0.5 mm.

[0035] The high-frequency radiation arm includes a first high-frequency tuning coupling arm 50 and a second high-frequency tuning coupling arm 70. A third gap 60 is provided between the first high-frequency tuning coupling arm 50 and the second high-frequency tuning coupling arm 70. The first high-frequency tuning coupling arm 50 works together with the second high-frequency tuning coupling arm 70 and the third gap 60 to make resonance appear in the high-frequency region. The resonant frequency of the high-frequency part can be fine-tuned by changing the length of the first high-frequency tuning coupling arm 50 or the second high-frequency tuning coupling arm 70, or the resonant frequency of the high-frequency part can be fine-tuned by changing the depth of the third gap 60 opened to the left, thereby broadening the bandwidth of the high-frequency frequency.

[0036] Preferably, the third gap is in a linear shape.

[0037] The antenna in this embodiment can cover the frequency bands of the Japanese Quasi-Zenith Satellite System (QZSS) in the global satellite navigation system GNSS and the regional satellite navigation system, the WLAN / Wi-Fi frequency band based on 802.11b, g, n, ax, and the Bluetooth frequency band;

[0038] Reference Figure 7-10 The three-in-one antenna in this embodiment supports multiple frequency bands, GNSS+QZSS: 1560-1610MHz, VSWR<2.2, efficiency greater than 35%, Gain>1.5dBi;

[0039] Bluetooth: 2400-2483.5MHz, VSWR<2.2, efficiency greater than 42%, WLAN / Wi-Fi: 2400-2497MHz, VSWR<2.2, efficiency greater than 42%, Gain>1.0dBi.

[0040] Embodiment 2:

[0041] Reference Figure 4-Figure 6 On the basis of the first embodiment, a coupling feed intermediate sheet 90 is further provided on the upper surface of the planar housing 201 in this embodiment. The coupling feed intermediate sheet 90 is located between the first slit 80 and the connecting portion 30, and a cut second slit 100 is provided between the coupling feed intermediate sheet 90 and the connecting portion 30. A coupling portion 110 is provided on the left side of the connecting portion 30 on the surface of the planar housing 201, and the coupling portion 110 couples and feeds to other parts through the first slit 80 and the second slit 100.

[0042] The second slot 100 completely separates the connecting portion 30 from the coupling feed intermediate sheet 90, and the coupling feed intermediate sheet 90 is coupled and fed only by the coupling portion 110. The low-frequency resonance frequency is extremely sensitive to the width of the slot. By adjusting the area of ​​the coupling feed intermediate sheet 90, the low- and high-frequency bandwidths and the low-frequency resonance frequency are adjusted. The coupling feeding through the second slot 100 simultaneously broadens the bandwidths of the high and low-frequency resonances.

[0043] Preferably, the shape of the second gap 100 is set to be U-shaped, and the width of the second gap 100 does not exceed 0.5 mm.

[0044] The antenna in this embodiment can cover the frequency bands of the Japanese Quasi-Zenith Satellite System (QZSS) in the global satellite navigation system GNSS and the regional satellite navigation system, the WLAN / Wi-Fi frequency band based on 802.11b, g, n, ax, and the Bluetooth frequency band;

[0045] like Figure 11-Figure 14 The three-in-one antenna in this embodiment supports multiple frequency bands, GNSS+QZSS: 1560-1610MHz, VSWR<1.5, efficiency 42%-47%, Gain>2.0dBi;

[0046] Bluetooth: 2400-2483.5MHz, VSWR<2.0, efficiency 46%-53%, WLAN / Wi-Fi: 2400-2497MHz, VSWR<2.0, efficiency 44%-53%, Gain>1.0dBi.

[0047] The three-in-one antenna in the above embodiment has a simple structure and concise circuits, which simplifies the construction of wireless communication equipment, reduces space occupation, and improves the design freedom of the equipment. In a compact machine environment, it not only meets multi-frequency requirements but also has good performance. The top radiation plate is coupled and fed by a completely cut-off gap, and power transmission is achieved through the interaction of radio waves or electromagnetic fields, which greatly improves the overall performance. The antenna is located on the upper part of the machine, mainly to minimize mutual interference with other antennas, ensure the stability and reliability of each communication signal, and make signal transmission more stable.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A three-in-one antenna for a walkie-talkie, characterized in that: include: An antenna bracket comprises a planar shell and a support column extending downward on one side of the planar shell, a grounding portion and a feeding portion are provided on the bottom surface of the support column, a connecting portion is provided on the outer side surface of the support column, the connecting portion connects the grounding portion and the feeding portion and extends to the upper surface of the planar shell, a radiation unit is also provided on the upper surface of the planar shell, a first gap is provided between the connecting portion and the radiation unit, and the connecting portion couples and feeds the radiation unit through the first gap.

2. The three-in-one antenna for walkie-talkies according to claim 1, characterized in that: The radiation unit comprises a low-frequency radiation arm and a high-frequency radiation arm connected to each other on the left and right sides, and a first cut-off gap is arranged between the high-frequency radiation arm and the connecting part.

3. The three-in-one antenna for walkie-talkies according to claim 2, characterized in that: The first gap has an inverted U shape.

4. The three-in-one antenna for walkie-talkies according to claim 2, characterized in that: The width of the first gap does not exceed 0.5 mm.

5. The three-in-one antenna for walkie-talkies according to claim 2, characterized in that: A coupling and feeding intermediate sheet is also provided on the upper surface of the planar shell. The coupling and feeding intermediate sheet is located between the first slit and the connecting portion, and a cut-off second slit is also provided between the coupling and feeding intermediate sheet and the connecting portion.

6. The three-in-one antenna for walkie-talkies according to claim 5, characterized in that: A coupling portion is also provided on the connecting portion on the upper surface of the planar shell, and the coupling portion couples and feeds electricity to other portions through the first slit and the second slit.

7. The three-in-one antenna for walkie-talkies according to claim 5, characterized in that: The second gap is in a U-shape.

8. The three-in-one antenna for walkie-talkies according to claim 5, characterized in that: The width of the second gap does not exceed 0.5 mm.

9. The three-in-one antenna for walkie-talkies according to claim 2 or 5, characterized in that: The low-frequency radiation arm is L-shaped.

10. The three-in-one antenna for walkie-talkies according to claim 2 or 5, characterized in that: The high-frequency radiation arm comprises a first high-frequency tuning coupling arm and a second high-frequency tuning coupling arm. A third gap is arranged between the first high-frequency tuning coupling arm and the second high-frequency tuning coupling arm. The third gap is in a straight line shape.

Images