L-band metal oscillator rod-shaped omnidirectional antenna

Abstract

The utility model discloses an L-band metal oscillator rod-shaped omnidirectional antenna, which relates to the technical field of antenna microwave, and comprises a dipole sleeve antenna group coaxial cable, a radio frequency connector and a protection mechanism, and the dipole sleeve antenna group comprises an antenna cap, a sleeve dipole upper oscillator and a sleeve dipole lower oscillator. And a connecting mechanism is arranged between the sleeve dipole upper vibrator and the sleeve dipole lower vibrator. According to the utility model, the dipole sleeve antenna group is matched with the connecting mechanism, so that the inner part of the antenna has the same diameter, the antenna is more suitable for the installation in a small-size space and the design of a regular-shaped accommodating groove, and the whole antenna has a smaller size, a lighter weight and a firmer structure; according to the antenna, the problem that the antenna on a flight carrier is easy to break when popped up for use is solved, the overall structure is simple, implementation is easy, and a new resonance frequency point can be introduced to enable the antenna to achieve a better impedance matching effect in a wider frequency range.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna microwaves, in particular to an L-band metal vibrator rod-shaped omnidirectional antenna. Background Art

[0002] At present, omnidirectional antennas are widely used in the fields of communication, reconnaissance, electronic countermeasures, etc. They have the characteristics of 360° coverage in the horizontal plane, and can transmit and receive electromagnetic waves in all directions in the horizontal plane. The polarization mode, gain size, beam width size and working bandwidth can be adjusted and improved according to the application requirements to adapt to a variety of different application conditions. The relative bandwidth of the basic form of dipole omnidirectional antenna return loss below -10dB is only about 13%. There are generally two ways to achieve bandwidth widening. One is to change the shape of the dipole's vibrator arm to a tapered gradient form, and the other is to introduce other metal structures to make the energy zone flow or couple to produce new resonant frequencies. The dipole antenna is generally fed in the form of center feeding, that is, feeding between the two vibrator arms of the dipole, and the signals fed into the two vibrator arms are equal and opposite.

[0003] However, the current omnidirectional antenna has poor broadband and impedance matching effect, and cannot meet the use conditions of flying vehicles and is prone to breakage. Therefore, we propose an L-band metal vibrator rod omnidirectional antenna. Utility Model Content

[0004] The purpose of the utility model is to provide an L-band metal dipole rod-shaped omnidirectional antenna to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: an L-band metal dipole rod-shaped omnidirectional antenna, comprising:

[0006] A dipole sleeve antenna group, the dipole sleeve antenna group comprising an antenna cap, a sleeve dipole upper element and a sleeve dipole lower element, the antenna cap is sleeved on the end of the inner wall of the sleeve dipole upper element, and a connecting mechanism is provided between the sleeve dipole upper element and the sleeve dipole lower element;

[0007] A coaxial cable, wherein the coaxial cable is inserted into the interior of the dipole sleeve antenna group;

[0008] A radio frequency connector, wherein the radio frequency connector is arranged on one side of the dipole sleeve antenna group;

[0009] A protection mechanism is arranged outside the dipole sleeve antenna group.

[0010] Preferably, the connection mechanism comprises a metal sleeve, the metal sleeve is arranged between the upper oscillator of the sleeve dipole and the lower oscillator of the sleeve dipole, and a first supporting mechanism is arranged inside the metal sleeve.

[0011] Preferably, the first supporting mechanism includes a first sleeve supporting medium and a second sleeve supporting medium, the first sleeve supporting medium and the second sleeve supporting medium are symmetrically arranged, annular grooves are provided on the outer walls of the first sleeve supporting medium and the second sleeve supporting medium, the metal sleeve is sleeved on the inner walls of the two annular grooves, a first blocking mechanism is arranged between the first sleeve supporting medium and the upper oscillator of the sleeve dipole, and a second blocking mechanism is arranged between the second sleeve supporting medium and the lower oscillator of the sleeve dipole.

[0012] Preferably, the first blocking mechanism comprises an upper vibrator connector, one end of which is interlaced with the inner wall of the upper vibrator of the sleeve dipole, and the other end of which is interlaced with the inner wall of the first sleeve supporting medium.

[0013] Preferably, the second blocking mechanism includes a lower oscillator connecting piece, one end of the lower oscillator connecting piece is interspersed with the inner wall of the lower oscillator of the sleeve dipole, and the other end of the lower oscillator connecting piece is interspersed with the inner wall of the second sleeve supporting medium, and a second supporting mechanism is provided on the side of the lower oscillator of the sleeve dipole close to the RF connector.

[0014] Preferably, the second supporting mechanism comprises a lower oscillator supporting medium, one end of which is interlaced with the inner wall of the lower oscillator of the sleeve dipole.

[0015] Preferably, the coaxial cable comprises an outer conductor and an inner conductor, and the inner conductor is inserted into the inner wall of the outer conductor.

[0016] Preferably, the outer conductor is connected to the lower oscillator of the sleeve dipole, and the inner conductor is connected to the upper oscillator of the sleeve dipole.

[0017] Preferably, the protection mechanism comprises an antenna cover, and the sleeve dipole upper oscillator and the sleeve dipole lower oscillator are both interspersed and arranged on the inner wall of the antenna cover.

[0018] Technical effects and advantages of the utility model:

[0019] The utility model utilizes the cooperation of a dipole sleeve antenna group and a connecting mechanism so that each part of the antenna has the same diameter, making it more suitable for installation in a small space and the design of a regularly shaped storage slot, so that the entire antenna has a smaller size, lighter weight and a more solid structure, overcoming the problem that the antenna on a flying carrier is easily broken when it is popped out for use. The overall structure is simple and easy to implement, and the connecting mechanism can introduce a new resonant frequency point so that the antenna achieves a better impedance matching effect within a wider frequency range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a front sectional structural schematic diagram of the utility model.

[0021] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the utility model.

[0022] Figure 3 It is a schematic diagram of the standing wave curve of the port of the utility model.

[0023] Figure 4 It is a vertical plane direction schematic diagram of the starting frequency, the ending frequency and the center frequency within the working frequency band of the antenna of the utility model.

[0024] Figure 5 It is a horizontal plane direction schematic diagram of the starting frequency, the ending frequency and the center frequency within the working frequency band of the antenna of the utility model.

[0025] In the figure: 101, antenna cap; 102, antenna cover; 103, sleeve dipole upper oscillator; 104, upper oscillator connecting piece; 105, first sleeve supporting medium; 106, metal sleeve; 107, second sleeve supporting medium; 108, lower oscillator connecting piece; 109, sleeve dipole lower oscillator; 110, lower oscillator supporting medium; 111, coaxial cable; 112, RF connector. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides Figure 1-5The L-band metal dipole rod-shaped omnidirectional antenna shown includes a dipole sleeve antenna group, a coaxial cable 111, a radio frequency connector 112 and a protective mechanism. The dipole sleeve antenna group includes an antenna cap 101, a sleeve dipole upper dipole 103 and a sleeve dipole lower dipole 109. The antenna cap 101 is sleeved on the end of the inner wall of the sleeve dipole upper dipole 103. A connecting mechanism is provided between the sleeve dipole upper dipole 103 and the sleeve dipole lower dipole 109. The coaxial cable 111 is inserted and arranged inside the dipole sleeve antenna group. The radio frequency connector 112 is arranged on one side of the dipole sleeve antenna group. The protective mechanism is arranged outside the dipole sleeve antenna group. Through the cooperation of the dipole sleeve antenna group and the connecting mechanism, each part of the antenna has the same diameter, making it more suitable for installation in a small space and collection of regular shapes. The nanoslot design makes the entire antenna smaller in size, lighter in weight and more solid in structure, overcoming the problem of the antenna being easily broken when popped out for use on a flying carrier. The overall structure is simple and easy to implement, and the connecting mechanism can introduce a new resonant frequency point so that the antenna can achieve better impedance matching in a wider frequency range. The sleeve dipole upper vibrator 103 and the sleeve dipole lower vibrator 109 are both silver-plated aluminum tubes, which can reduce the weight of the antenna while ensuring good electrical connection performance between parts. Silver plating facilitates welding, and a tinning hole is opened at the end of the tube. After the connector is installed, tin is fed for welding. The L-band metal vibrator rod omnidirectional antenna radiates omnidirectionally in the horizontal direction, and a coaxial cable 111 is used to feed the middle of the antenna, which has no effect on the pointing direction of the antenna's vertical plane radiation pattern. The RF connector 112 uses an SMA-JB2 connector.

[0028] The connection mechanism includes a metal sleeve 106, which is arranged between the upper oscillator 103 of the sleeve dipole and the lower oscillator 109 of the sleeve dipole. A first supporting mechanism is arranged inside the metal sleeve 106. The metal sleeve 106 is a silver-plated aluminum tube like the upper oscillator 103 of the sleeve dipole and the lower oscillator 109 of the sleeve dipole, which can reduce the weight of the antenna. At the same time, the metal sleeve 106 can introduce a new resonant frequency point so that the antenna achieves a better impedance matching effect in a wider frequency range. The length of the upper oscillator 103 of the sleeve dipole and the lower oscillator 109 of the sleeve dipole is The length of the metal sleeve 106 mainly affects the working frequency of the antenna. There is an optimal ratio between the length of the metal sleeve 106 and the interval length between the metal sleeve 106 and the upper dipole 103 of the sleeve dipole and the lower dipole 109 of the sleeve dipole, so that the working bandwidth of the antenna is wider. The size of the antenna diameter is related to the level of the working frequency and the bandwidth. When the working frequency remains unchanged, when the antenna diameter increases or decreases, the length of the upper dipole 103 of the sleeve dipole and the lower dipole 109 of the sleeve dipole also needs to be reduced or increased accordingly to offset the impact on the working frequency deviation. At the same time, a larger diameter is conducive to the antenna obtaining a wider bandwidth.

[0029] The first supporting mechanism includes a first sleeve supporting medium 105 and a second sleeve supporting medium 107, the first sleeve supporting medium 105 and the second sleeve supporting medium 107 are symmetrically arranged, an annular groove is provided on the outer wall of the first sleeve supporting medium 105 and the second sleeve supporting medium 107, the metal sleeve 106 is sleeved on the inner wall of the two annular grooves, a first blocking mechanism is arranged between the first sleeve supporting medium 105 and the upper oscillator 103 of the sleeve dipole, a second blocking mechanism is arranged between the second sleeve supporting medium 107 and the lower oscillator 109 of the sleeve dipole, the first sleeve supporting medium 105 separates the upper oscillator 103 of the sleeve dipole from the metal sleeve 106, and the second sleeve The sleeve supporting medium 107 separates the metal sleeve 106 from the lower oscillator 109 of the sleeve dipole. The first sleeve supporting medium 105 and the second sleeve supporting medium 107 are both made of polyetherimide with strong temperature resistance, which can prevent short circuits between the upper oscillator 103 of the sleeve dipole, the metal sleeve 106 and the lower oscillator 109 of the sleeve dipole. The first sleeve supporting medium 105 and the second sleeve supporting medium 107 are used as media to ensure sufficient insertion depth and appropriate tight fit tolerance to ensure structural firmness and supporting strength. At the same time, it can ensure that the antenna can still have good structural strength and appropriate tight fit tolerance to ensure structural firmness and sufficient supporting strength when working at a higher power.

[0030] The first blocking mechanism includes an upper vibrator connector 104, one end of which is interlaced with the inner wall of the upper vibrator 103 of the sleeve dipole, and the other end of which is interlaced with the inner wall of the first sleeve supporting medium 105. The second blocking mechanism includes a lower vibrator connector 108, one end of which is interlaced with the inner wall of the lower vibrator 109 of the sleeve dipole, and the other end of which is interlaced with the inner wall of the second sleeve supporting medium 107. The lower vibrator 109 of the sleeve dipole is provided with a side close to the RF connector 112. The second supporting mechanism, the upper vibrator connector 104 and the lower vibrator connector 108 are made of aluminum alloy and are processed into a stepped shape for easy connection with the first sleeve supporting medium 105 and the second sleeve supporting medium 107. The size of the stepped shape also has a certain improvement effect on impedance matching. The surface of the upper vibrator connector 104 and the lower vibrator connector 108 is silver-plated for easy welding. The upper vibrator connector 104 and the lower vibrator connector 108 are partially processed with threads on the surface where they are inserted into the sleeve dipole upper vibrator 103 and the sleeve dipole lower vibrator 109 for easy welding, so that the solder fills the gaps and forms a good electrical contact.

[0031] Among them, the second supporting mechanism includes a lower dipole supporting medium 110, one end of which is interlaced with the inner wall of the sleeve dipole lower dipole 109, and sealant is poured into the gap between the lower dipole supporting medium 110 and the RF connector 112 to ensure the sealing of the antenna gap and prevent the connector from rotating and loosening.

[0032] Among them, the coaxial cable 111 includes an outer conductor and an inner conductor, the inner conductor is inserted into the inner wall of the outer conductor, the outer conductor is connected to the lower dipole 109 of the sleeve dipole, and the inner conductor is connected to the upper dipole 103 of the sleeve dipole. The upper dipole connector 104 and the lower dipole connector 108 have holes at the thin ends to facilitate the coaxial cable 111 to pass through and be welded. The outer conductor of the coaxial cable 111 and the inner wall of the lower dipole 109 of the sleeve dipole form a balun structure of a quarter-wavelength choke slot to ensure balanced feeding of the antenna.

[0033] Among them, the protection mechanism includes an antenna cover 102, a sleeve dipole upper oscillator 103 and a sleeve dipole lower oscillator 109 are both inserted into the inner wall of the antenna cover 102, and the antenna cover 102 is wound with multi-directional epoxy glass fiber. After the antenna is assembled, the antenna surface is coated with glue to ensure that the antenna cover 102 and the antenna are tightly combined.

[0034] The antenna is simulated, and the simulation results are the voltage standing wave ratio of the antenna input port, the horizontal and vertical radiation patterns of the starting frequency, end frequency and center frequency of the working frequency band, such as Figure 3 , 4 , as shown in Figure 5.

[0035] like Figure 3 As shown, the L-band metal dipole rod-shaped omnidirectional antenna operates in the L-band, and the port voltage standing wave ratio is less than 1.5 in the frequency range of 1.3 GHz to 1.8 GHz, and has good impedance matching characteristics.

[0036] like Figure 4 and Figure 5 As shown, the maximum gain in the horizontal direction is about 2.37dB, the maximum gain in the vertical direction is about 2.16dB, and the non-circularity of the horizontal plane pattern is about 0.21dB. It can be seen that the antenna gain meets the general dipole antenna gain level, the horizontal plane pattern is relatively round, and has good omnidirectional radiation characteristics.

[0037] In summary, the L-band metal vibrator rod-shaped omnidirectional antenna designed by the utility model realizes the broadband characteristics of the antenna through the coaxially assembled metal sleeve 106, and the outer conductor of the feeding coaxial cable 111 and the inner wall of the vibrator 109 under the sleeve dipole form a quarter-wavelength choke structure, which ensures that the two arms of the vibrator are fed with equal-amplitude reverse signals in a balanced manner, so that the antenna has a regular radiation pattern and good omnidirectional performance. Compared with the common rod-shaped dipole antenna, it has a wider working bandwidth, a more solid structure, is more suitable for the pop-up use of a flying carrier, has a regular shape, a simple structure, and is easy to implement.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. L-band metal vibrator rod-shaped omnidirectional antenna, characterized in that: include: A dipole sleeve antenna group, the dipole sleeve antenna group comprising an antenna cap (101), a sleeve dipole upper oscillator (103) and a sleeve dipole lower oscillator (109), the antenna cap (101) being sleeved on the end of the inner wall of the sleeve dipole upper oscillator (103), and a connecting mechanism being provided between the sleeve dipole upper oscillator (103) and the sleeve dipole lower oscillator (109); A coaxial cable (111), wherein the coaxial cable (111) is inserted into the interior of the dipole sleeve antenna group; A radio frequency connector (112), the radio frequency connector (112) being arranged on one side of the dipole sleeve antenna group; A protection mechanism is arranged outside the dipole sleeve antenna group.

2. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 1, characterized in that: The connection mechanism comprises a metal sleeve (106), wherein the metal sleeve (106) is arranged between the sleeve dipole upper oscillator (103) and the sleeve dipole lower oscillator (109), and a first supporting mechanism is arranged inside the metal sleeve (106).

3. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 2, characterized in that: The first supporting mechanism comprises a first sleeve supporting medium (105) and a second sleeve supporting medium (107), the first sleeve supporting medium (105) and the second sleeve supporting medium (107) are symmetrically arranged, annular grooves are provided on the outer walls of the first sleeve supporting medium (105) and the second sleeve supporting medium (107), the metal sleeve (106) is sleeved on the inner walls of the two annular grooves, a first blocking mechanism is arranged between the first sleeve supporting medium (105) and the sleeve dipole upper oscillator (103), and a second blocking mechanism is arranged between the second sleeve supporting medium (107) and the sleeve dipole lower oscillator (109).

4. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 3, characterized in that: The first blocking mechanism comprises an upper vibrator connecting member (104), one end of the upper vibrator connecting member (104) is interlaced with the inner wall of the upper vibrator (103) of the sleeve dipole, and the other end of the upper vibrator connecting member (104) is interlaced with the inner wall of the first sleeve supporting medium (105).

5. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 3, characterized in that: The second blocking mechanism comprises a lower oscillator connecting piece (108), one end of the lower oscillator connecting piece (108) is interlaced with the inner wall of the sleeve dipole lower oscillator (109), the other end of the lower oscillator connecting piece (108) is interlaced with the inner wall of the second sleeve supporting medium (107), and a second supporting mechanism is arranged on a side of the sleeve dipole lower oscillator (109) close to the radio frequency connector (112).

6. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 5, characterized in that: The second supporting mechanism comprises a lower oscillator supporting medium (110), one end of which is interlaced with the inner wall of the sleeve dipole lower oscillator (109).

7. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 1, characterized in that: The coaxial cable (111) comprises an outer conductor and an inner conductor, wherein the inner conductor is inserted into the inner wall of the outer conductor.

8. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 7, characterized in that: The outer conductor is connected to the lower oscillator (109) of the sleeve dipole, and the inner conductor is connected to the upper oscillator (103) of the sleeve dipole.

9. The L-band metal dipole rod-shaped omnidirectional antenna according to claim 1, characterized in that: The protection mechanism comprises a radome (102), and the sleeve dipole upper oscillator (103) and the sleeve dipole lower oscillator (109) are both interspersed and arranged on the inner wall of the radome (102).

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