Device for automatically adjusting length of short-wave antenna oscillator
The automatic adjustment device of the static and moving contacts driven by electromagnets solves the problem of manually adjusting the length of the vibrator arm when the frequency of the shortwave communication antenna changes, and realizes automatic adjustment and efficient radiation.
Patent Information
- Application Number
- CN202423050938.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing shortwave communication antennas require frequent manual adjustment of the antenna arm length when the frequency changes, which makes them inconvenient to use and reduces radiation efficiency.
A shortwave antenna vibrator length automatic adjustment device is used. The static contact and the moving contact are connected or disconnected by an electromagnet to automatically adjust the length of the vibrator arm. Automatic adjustment is achieved using a wire loop, an armature piece and a reset piece.
It realizes automatic adjustment of the antenna arm length when the communication frequency band changes, making it more convenient to use and ensuring the radiation efficiency of the antenna.
Smart Images
Figure CN223462408U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to short wave communication technical field, concretely is a kind of short wave antenna oscillator length automatic adjusting device. BACKGROUND
[0002] Short wave communication is widely used in meteorology, traffic, rescue and other aspects due to long transmission distance, simple equipment structure, not limited by network hub and relay. But short wave communication is susceptible to ionospheric changes, and communication frequency needs to change with season and day-night changes. Due to long short wave wavelength, the antenna structure is large, and when the communication frequency changes, the antenna radiation efficiency may be reduced.
[0003] To achieve approximately optimal radiation efficiency in a wide frequency range, the corresponding parameters of the antenna need to be adjusted. The existing method is to keep the antenna oscillator length unchanged, and to use antenna tuning to match the antenna to achieve better radiation effect. However, due to the physical properties of electromagnetic waves, as the wavelength increases or decreases, the antenna oscillator should change in length, which requires corresponding adjustment of the antenna oscillator arm length. As shown in Figure 1 If the commonly used dipole antenna 100 needs to change the effective access length of the oscillator arm, it needs to cross the knot-shaped insulator 101 through the connecting line 102, and when the communication frequency band needs to change multiple times, the antenna oscillator arm length needs to be adjusted manually frequently, which is not convenient to use and reduces the antenna radiation efficiency. UTILITY MODEL CONTENT
[0004] The utility model aims at the above-mentioned shortage, provides a kind of short wave antenna oscillator length automatic adjusting device, can automatically adjust antenna oscillator arm length when communication frequency band needs to change multiple times, it is more convenient to use, also guarantees the antenna radiation efficiency.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0006] A kind of short wave antenna oscillator length automatic adjusting device, including one end connection equipment terminal's feed line, it is characterized by: oscillator arm one, one end connection in the feed line on oscillator arm two, the static contact and the dynamic contact of opposite arrangement, and the adjusting mechanism for driving the static contact and the dynamic contact abutment communication, the static contact and the dynamic contact are respectively arranged in the end of oscillator arm one and oscillator arm two, when the static contact and the dynamic contact abutment, oscillator arm one and oscillator arm two are communicated.
[0007] Further, the adjusting mechanism comprises a shell, an electric wire loop, an armature sheet and a reset member arranged in the shell, the electric wire loop is connected with a power supply, a key, an electromagnet and an instruction receiving control module electrically connected with the key, the movable contact is fixed on the armature sheet, when the electromagnet is in an energized state, the suction force of the electromagnet drives the armature sheet to move, so that the movable contact abuts against the fixed contact, when the electromagnet is in a de-energized state, the reset member is used for resetting the armature sheet.
[0008] Further, the reset member comprises a mounting plate fixed in the shell, and a spring arranged perpendicularly to the mounting plate, the initial end and the terminal end of the spring are connected with the mounting plate and the armature sheet respectively.
[0009] Further, a guide rod is arranged on the mounting plate, the guide rod is arranged perpendicularly to the armature sheet, and the armature sheet is slidably connected to the guide rod.
[0010] The utility model discloses the beneficial effects are:
[0011] In actual application, when in use, the fixed contact and the movable contact are communicated or disconnected through the adjusting mechanism, so that the vibrator arm one and the vibrator arm two are communicated or disconnected, thereby the length of the antenna vibrator arm is adjusted, and manual frequent adjustment is not needed, and use is more convenient. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the structural diagram of the prior bipolar antenna;
[0013] Figure 2 It is the overall structure schematic diagram of the utility model;
[0014] Figure 3 It is the structural diagram of the shell inside in the utility model;
[0015] Fig. 1 is the structural diagram of the prior bipolar antenna; Fig. 2 is the overall structure schematic diagram of the utility model; Fig. 3 is the structural diagram of the shell inside in the utility model; Fig. 4 is the structural diagram of the adjusting mechanism in the utility model. DETAILED DESCRIPTION
[0016] As Figure 1 , Figure 2 and Figure 3As shown in the drawings, the application is a short wave antenna oscillator length automatic adjusting device, which comprises a feeder 10 connected with a terminal of a device, a first oscillator arm 20, a second oscillator arm 30 connected with the feeder 10, a static contact 40 and a dynamic contact 50 arranged oppositely, and an adjusting mechanism for driving the static contact 40 and the dynamic contact 50 to abut and connect, wherein the static contact 40 and the dynamic contact 50 are arranged at the end of the first oscillator arm 20 and the second oscillator arm 30 respectively, and the first oscillator arm 20 and the second oscillator arm 30 are connected when the static contact 40 and the dynamic contact 50 abut.
[0017] In use, the static contact 40 and the dynamic contact 50 are driven by the adjusting mechanism to connect or disconnect, so that the first oscillator arm 20 and the second oscillator arm 30 are connected or disconnected, thereby adjusting the length of the antenna oscillator arm without manual frequent adjustment, and the use is more convenient; the application can automatically adjust the length of the antenna oscillator arm when the communication frequency band needs to be changed multiple times, the use is more convenient, and the antenna radiation efficiency is ensured.
[0018] As shown in the drawings, Figure 1 , Figure 2 and Figure 3 , the adjusting mechanism comprises a shell 601, an electric wire loop 602, an armature sheet 603 and a reset member arranged in the shell 601, the electric wire loop 602 is connected with a power supply 604, a key 605, an electromagnet 606 and an instruction receiving control module 607 electrically connected with the key 605, the dynamic contact 50 is fixed on the armature sheet 603, the electromagnet 606 is in an energized state, the suction force of the electromagnet 606 drives the armature sheet 603 to move, so that the dynamic contact 50 abuts against the static contact 40, the electromagnet 606 is in a de-energized state, and the reset member is used to reset the armature sheet 603, wherein the left and right sides of the shell 601 are fixedly connected with the first oscillator arm 20 and the second oscillator arm 30 respectively, and the shell 601 can be fixed on the support frame of the antenna through a connecting frame; in the embodiment, when the instruction receiving control module 607 receives a command to lengthen the oscillator arm, the instruction receiving control module 607 controls the key 605 to be closed, the electric wire loop 602 is energized to generate an electromagnetic effect, the suction force of the electromagnet 606 drives the armature sheet 603 to move close to the electromagnet 606 to overcome the pulling force of the reset member, thereby driving the dynamic contact 50 on the armature sheet 603 to abut against and connect with the static contact 40; when the instruction receiving control module 607 receives a command to shorten the oscillator arm, the instruction receiving control module 607 controls the key 605 to be opened, the electric wire loop 602 is de-energized, the suction force of the electromagnet 606 disappears, and the armature sheet 603 is reset through the reset member, thereby disconnecting the dynamic contact 50 and the static contact 40.
[0019] As shown in the drawings, Figure 1 , Figure 2 and Figure 3As shown, the reset member comprises a mounting plate 6081 fixed in the shell 601, a spring 6082 arranged perpendicularly to the mounting plate 6081, and the initial end and the terminal end of the spring 6082 are connected to the mounting plate 6081 and the armature plate 603 respectively; in this embodiment, when the electric wire circuit 602 is electrified and electromagnetic effect is generated, the suction force of the electromagnet 606 makes the armature plate 603 overcome the pulling force of the spring 6082 and approach the electromagnet 606, thereby driving the movable contact 50 on the armature plate 603 to abut against and communicate with the static contact 40; when the electric wire circuit 602 is de-energized, the suction force of the electromagnet 606 disappears, and the restoring force of the spring 6082 makes the armature plate 603 reset, thereby making the movable contact 50 and the static contact 40 disconnected.
[0020] As shown in Figure 1 , Figure 2 and Figure 3 , the mounting plate 6081 is provided with a guide rod 6083 arranged perpendicularly to the armature plate 603, and the armature plate 603 is slidingly connected to the guide rod 6083; in this embodiment, the armature plate 603 is guided by the guide rod 6083 during the process of approaching or moving away from the electromagnet 606.
[0021] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the scope defined by the present application.
Claims
1. A short wave antenna element length automatic adjustment device comprising a feeder line (10) connected to a terminal of a terminal equipment, characterized in that: The vibrator arm one (20), the vibrator arm two (30) connected at one end on the feeder (10), the static contact (40) and the dynamic contact (50) arranged opposite, and the adjusting mechanism used for driving the static contact (40) and the dynamic contact (50) to abut and communicate, the static contact (40) and the dynamic contact (50) are arranged at the end of the vibrator arm one (20) and the vibrator arm two (30) respectively, when the static contact (40) and the dynamic contact (50) abut, the vibrator arm one (20) and the vibrator arm two (30) communicate.
2. The apparatus according to claim 1, wherein The adjusting mechanism comprises a shell (601), an electric wire loop (602), an armature sheet (603) and a reset part arranged in the shell (601), the electric wire loop (602) is connected with a power supply (604), a key (605), an electromagnet (606) and an instruction receiving control module (607) electrically connected with the key (605), the dynamic contact (50) is fixed on the armature sheet (603), when the electromagnet (606) is in the energized state, the suction force of the electromagnet (606) drives the armature sheet (603) to move, so that the dynamic contact (50) abuts against the static contact (40), when the electromagnet (606) is in the de-energized state, the reset part is used for resetting the armature sheet (603).
3. The apparatus of claim 2 wherein, The reset part comprises a mounting plate (6081) fixed in the shell (601), a spring (6082) arranged perpendicularly to the mounting plate (6081), the initial end and the terminal end of the spring (6082) are connected with the mounting plate (6081) and the armature sheet (603) respectively.
4. The apparatus according to claim 3, wherein The mounting plate (6081) is provided with a guide rod (6083), the guide rod (6083) is arranged perpendicularly to the armature sheet (603), and the armature sheet (603) is slidably connected to the guide rod (6083).