CN217641791U - Short wave directional middle-low elevation angle transmitting antenna - Google Patents
Short wave directional middle-low elevation angle transmitting antenna Download PDFInfo
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- CN217641791U CN217641791U CN202221507292.4U CN202221507292U CN217641791U CN 217641791 U CN217641791 U CN 217641791U CN 202221507292 U CN202221507292 U CN 202221507292U CN 217641791 U CN217641791 U CN 217641791U
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Abstract
The utility model relates to an antenna technology field, especially a short wave orientation low elevation angle transmitting antenna. The antenna comprises a supporting tower, a supporting tower stay wire, a tower-shaped lightning rod, an antenna curtain and an impedance converter, wherein the antenna curtain is used for radiating radio frequency energy and comprises a first antenna curtain (26), a second antenna curtain (27), a third antenna curtain (23) and a fourth antenna curtain (24), wherein the third antenna curtain (23) and the fourth antenna curtain (24) form a reflecting curtain body to form a reflecting surface for reflecting radio frequency signals sent by the first antenna curtain (26) and the second antenna curtain (27) in a direction perpendicular to the reflecting curtain body; the utility model discloses an antenna can 5kW short wave transmitting machine of adaptation, can be at the high efficiency transmission shortwave radio-frequency signal in appointed position, realize the effective cover to 3500 kilometers distance range in the appointed region, realize the requirement that maximum direction gain is high, horizontal plane wave beam is wide, communication distance is far away.
Description
Technical Field
The utility model relates to an antenna technology field, especially a short wave orientation low elevation angle transmitting antenna.
Background
The log periodic antenna is a non-frequency-varying antenna, and the non-frequency-varying antenna means that electrical characteristics such as impedance, a directional diagram, gain, a standing-wave ratio and the like of the antenna periodically change along with the logarithm of frequency and are kept basically unchanged in a wide frequency band. It is constructed according to the following theory: the antenna remains in its original configuration after being transformed by a particular scaling factor tau. Thus, the performance of the antenna appearing at the frequencies τ f and τ is repeated in the frequency ranges τ f and τ f, and by analogy, the electrical performance of the antenna is periodically changed in a wide frequency range. Therefore, if the linear performance index change in the f-tau frequency band is small, the requirement of the non-frequency-varying antenna can be met. Meanwhile, the log periodic antenna is a linearly polarized antenna, and the polarization direction of an electric field is parallel to the direction of the oscillator. Therefore, the log periodic antenna has broadband characteristics and linear polarization characteristics, so that the application of the log periodic antenna as a corona discharge signal detection system is the optimal choice for an antenna part.
The log-periodic antenna is often used as a transmitting antenna in the field of wireless short-wave communication, the application is wide, and the log-periodic antenna needs to be optimized according to different requirements in a specific application scene so as to meet different requirements.
The log periodic antenna structure is shown in fig. 1, and the main structural parameters thereof are a period rate or a scale factor (τ), an opening angle or a structural angle (2 α), and a spacing factor (σ). As can be known from the log periodic antenna theory, the relationship between the three parameters is α = arctg (1- τ)/4 σ, and therefore, the performance of the log periodic antenna can be optimized by adjusting two of the parameters τ, α, and σ.
Disclosure of Invention
The invention of the utility model aims to: aiming at a 5kW short wave transmitter which is adaptive, short wave radio frequency signals can be transmitted in a designated direction at high efficiency, effective coverage of a 3500 kilometer distance range in a designated area is realized, the requirements of high maximum directional gain, wide horizontal plane wave beam and long communication distance are realized through the optimization of a radiator structure, and the short wave directional medium-low elevation angle transmitting antenna is provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a short wave directional middle-low elevation angle transmitting antenna comprises a supporting tower, a supporting tower pull wire (3), a tower-shaped lightning rod, an antenna screen (5) and an impedance converter (25),
the antenna curtain (5) is used for radiating radio frequency energy and comprises a first antenna curtain (26), a second antenna curtain (27), a third antenna curtain (23) and a fourth antenna curtain (24), wherein linear radiators in the first antenna curtain (26) and the second antenna curtain (27) are arranged in parallel according to the length characteristic of a logarithmic period; the third antenna curtain (23) and the fourth antenna curtain (24) form a reflecting curtain body to form a reflecting surface, and the reflecting surface is used for reflecting the radio-frequency signals sent by the first antenna curtain (26) and the second antenna curtain (27) in a direction vertical to the reflecting curtain body;
the supporting tower comprises a first supporting tower (1), a second supporting tower (2) and an antenna curtain supporting body (4), the antenna curtain supporting body (4) is used for supporting the antenna curtain (5), the antenna curtain supporting body (4) and the antenna curtain (5) jointly form an antenna body, the first supporting tower (1) and the second supporting tower (2) are used for supporting the antenna body,
the tower-type lightning rod is arranged on the supporting tower, is used for supporting the first antenna curtain (26) and the second antenna curtain (27), and is used for lightning protection of the antenna;
the impedance transformer (25) is arranged at one end of the midline of the antenna screen (5) far away from the supporting tower.
The directional medium-low elevation angle transmitting antenna constructed by the structure fully utilizes the characteristics of a log-periodic antenna, and the third antenna curtain (23) and the fourth antenna curtain (24) form a reflecting curtain body to form a reflecting surface for reflecting radio-frequency signals sent by the first antenna curtain (26) and the second antenna curtain (27) in the direction vertical to the reflecting curtain body, so that when the antenna is used as the transmitting antenna, the antenna has specific directivity, is adaptive to a 5kW short-wave transmitter, can efficiently transmit short-wave radio-frequency signals in a specified direction, and realizes effective coverage of a 3500 kilometer distance range in a specified area.
Preferably, the antenna curtain support body (4) comprises a first support body (7), a second support body (8) and a third support body (9), the first support body (7) and the second support body (8) are in straight line section shapes, the first support body (7) and the second support body (8) are perpendicular to each other and are arranged in a cross shape, the intersection point of the first support body (7) and the second support body (8) is a first intersection point (10), and the first support tower (1) and the antenna curtain support body (4) are connected to the first intersection point (10);
set up nodical (11) of second apart from first nodical (10) certain distance on first supporter (7), second support tower (2) with antenna curtain supporter (4) connect in nodical (11) department of second.
Preferably, the tower-type lightning rod comprises a first tower-type lightning rod (12) and a second tower-type lightning rod (13),
the first tower-type lightning rod (12) is formed by taking the first intersection point (10) as a starting point and extending along the first support tower (1) in a direction vertical to the ground and far away from the ground;
the second tower-type lightning rod (13) is formed by taking the second intersection point (11) as a starting point and extending along the second support tower (2) in a direction vertical to the ground and far away from the ground;
first antenna curtain pull wire (14) is connected between the summit of first tower-type lightning rod (12) and the summit of second tower-type lightning rod (13), fourth antenna curtain pull wire (16) has been connected between the summit of second tower-type lightning rod (13) and endpoint (15) that first supporter (7) kept away from first nodical (10), fifth antenna curtain pull wire (17) has been connected between the first supporter (7) and the summit of first tower-type lightning rod (12) apart from the endpoint that first nodical (10) is nearer, first antenna curtain pull wire (14), fourth antenna curtain pull wire (16) and fifth antenna curtain pull wire (17) are used for supporting first antenna curtain (26), second antenna curtain (27).
The tower-type lightning rod is installed in first nodical and second nodical to just in time dock with first support tower (1) and second support tower (2), on the one hand, played the effect that the antenna is lightning-arrest, on the other hand can be used for supporting the antenna curtain body through acting as go-between, and the antenna curtain body can expand, is favorable to the radiation of radio frequency energy.
Preferably, the third support (9) is in the shape of a straight line segment, the length of the third support (9) is shorter than that of the second support (8), and the third support (9) is arranged at an end point far away from the first intersection point (10) and is parallel to the second support (8);
a second antenna curtain wire (21) is connected between the first end point (19) of the third supporting body (9) and the first end point (20) of the second supporting body (8), and the second antenna curtain wire (21) is matched with the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) and is used for supporting the first antenna curtain (26);
a third antenna curtain wire is connected between the other end of the third supporting body (9) opposite to the first end point (19) and a second end point (22) of the second supporting body (8), and the third antenna curtain wire is matched with the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) and used for supporting a second antenna curtain (27).
The third support body (9) forms a frame for supporting the antenna screen together with the first support body (7) and the second support body (8), and the end points of the first support body (7), the second support body (8), the third support body (9), the first tower-shaped lightning rod (12) and the second tower-shaped lightning rod (13) are used as fixing points, so that the two ends of the linear radiator in the antenna screen can be fixed, and the antenna screen for radiation is formed between the pull lines.
Preferably, the projections of the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) on the ground are located on the same straight line, the projections are overlapped with the projection of the first support body (7) on the ground, and the first antenna curtain (26) and the second antenna curtain (27) are symmetrically arranged by taking a connecting line formed by the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) as a central line. The arrangement is such that the present antenna retains the symmetry characteristic of a log periodic antenna.
Preferably, a connecting line formed by the first antenna screen pulling wire (14), the fourth antenna screen pulling wire (16) and the fifth antenna screen pulling wire (17) is an intersecting line of a plane where the first antenna screen (26) is located and a plane where the second antenna screen (27) is located, and an included angle of 154 degrees is formed. Generally, the symmetric antenna screens of the log periodic antenna are on a plane, but in the present case, two antenna screens are symmetric and do not form an included angle of 154 degrees, which is mainly to make the antenna radiation energy radiate according to the designed direction and have directivity.
Preferably, the third antenna screen (23) is arranged between the first end point (20) of the second support body (8) and the end point of the first support body (7) which is closer to the first intersection point (10);
the fourth antenna screen (24) is arranged between the second end point of the second support body (8) and the end point of the first support body (7) close to the first intersection point (10);
the third antenna screen (23) and the fourth antenna screen (24) are formed by a plurality of linear radiators parallel to the second support body (8) to form a reflecting surface, and the third antenna screen (23) and the fourth antenna screen (24) are symmetrically arranged with the end point of the first support body (7) close to the first intersection point (10) as the center. The third antenna curtain (23) and the fourth antenna curtain (24) form a reflecting curtain, and radio frequency signals sent by the first antenna curtain (26) and the second antenna curtain (27) are reflected according to a direction vertical to the reflecting curtain body.
Preferably, the impedance converter has a resistance of 200 Ω.
Preferably, the number of the supporting tower pull wires (3) is 12, wherein 6 supporting tower pull wires are arranged on the first supporting tower (1) and the second supporting tower (2), one end of each supporting tower pull wire is fixed on the supporting tower, the other end of each supporting tower pull wire is fixed on the ground, every two supporting tower pull wires form a group, and the three groups of supporting tower pull wires form a 120-degree projection on the ground.
Preferably, the height of the first support tower (1) and the second support tower (2) is 16.5 meters, and the projection distance of the first support tower (1) and the second support tower (2) on the ground is 6 meters.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model discloses an antenna can 5kW short wave transmitting machine of adaptation, can be at the high efficiency transmission shortwave radio frequency signal in assigned position, realize 3500 kilometers apart from the effective cover of scope in the assigned area, through irradiator structural optimization, realize the requirement that maximum direction gain is high, horizontal plane beam width, communication distance are far away.
Drawings
FIG. 1 is a diagram of a log periodic antenna in the background art;
fig. 2 is an overall view of a short-wave directional medium-low elevation angle transmitting antenna in embodiment 1 of the present invention;
fig. 3 is an enlarged structural view of the antenna body in embodiment 1 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
The structure of a short wave directional medium-low elevation angle transmitting antenna is shown in figure 2, which mainly comprises a supporting tower, a supporting tower stay wire and accessories 3 thereof, an antenna curtain 5 and an impedance converter 25.
The supporting tower comprises a first supporting tower 1, a second supporting tower 2 and an antenna curtain supporting body 4, the antenna curtain supporting body 4 is used for supporting an antenna curtain 5, the antenna curtain supporting body and the antenna curtain jointly form an antenna body 6, and the first supporting tower 1 and the second supporting tower 2 are used for supporting the antenna body. The projection distance between the first support tower 1 and the second support tower 2 on the ground is 6 meters, and the impedance transformer 25 is installed at one end far away from the support towers on the midline of the antenna screen 5.
An enlarged structure diagram of the antenna body is shown in fig. 3, the antenna curtain support body 4 includes a first support body 7, a second support body 8 and a third support body 9, the first support body 7 and the second support body 8 are in a straight line shape, the first support body 7 and the second support body 8 are perpendicular to each other and are arranged in a cross shape, an intersection point (named as a first intersection point 10) of the first support body 7 and the second support body 8 is used for being connected with the first support tower 1 (or connected with the second support tower, the case is illustrated in fig. 3 by being connected with the first support tower as an example, if the antenna curtain support body is connected with the second support tower, the principle is the same, and the antenna curtain support body is also within the protection range of the present invention), and a second intersection point 11 which is a certain distance away from the first intersection point 10 on the first support body 7 is used for being connected with the second support tower 2 (or connected with the first support tower). A first tower-shaped lightning rod 12 is formed along the first support tower 1 in a direction perpendicular to the ground with the first intersection 10 as a starting point, and similarly, a second tower-shaped lightning rod 13 is formed along the second support tower 2 with the second intersection 11 as a starting point, a first antenna curtain wire 14 is connected between a vertex of the first tower-shaped lightning rod 12 and a vertex of the second tower-shaped lightning rod 13, a fourth antenna curtain wire 16 is connected between an end point 15 of the first support 7 far from the first intersection 10 and a vertex of the second tower-shaped lightning rod 13, a fifth antenna curtain wire 17 is connected between an end point of the first support 7 near the first intersection 10 and a vertex of the first tower-shaped lightning rod 12, projections of the first antenna curtain wire 14, the fourth antenna curtain wire 16 and the fifth antenna curtain wire 17 on a straight line are positioned on a straight line, a line on which projection is positioned coincides with a projection of the first support 7 on the ground, the first antenna curtain wire 14, the fourth antenna curtain wire 16 and the fifth antenna curtain wire 17 are used for fixing a linear radiator 18 of the ground antenna curtain wire, and each linear radiator 18 of the ground antenna curtain wire is used for fixing the linear radiator.
Further, the third support 9 is also in the shape of a straight line segment, and the length of the third support 9 is shorter than that of the second support 8, and the third support 9 is provided at an end point distant from the first intersection 10, parallel to the second support 8.
A second antenna screen wire 21 is connected between the first end 19 of the third support 9 and the first end 20 of the second support 8, a third antenna screen wire is connected between the second end (the end opposite to the first end) of the third support 9 and the second end 22 of the second support 8, a plurality of linear radiators 18 are arranged in parallel in a logarithmic cycle length characteristic between the first antenna screen wire 14 and the second antenna screen wire 21 and between the fourth antenna screen wire 16 and the second antenna screen wire 21, and the plurality of linear radiators 18 between the first antenna screen wire 14 and the second antenna screen wire 21 and between the fourth antenna screen wire 16 and the second antenna screen wire 21 constitute the first antenna screen. Between the first antenna curtain wire 14 and the third antenna curtain wire, and between the fourth antenna curtain wire 16 and the third antenna curtain wire, a plurality of linear radiators 18 are arranged in parallel in a space characteristic of a log-periodic antenna, the plurality of linear radiators 18 between the first antenna curtain wire 14 and the third antenna curtain wire, and between the fourth antenna curtain wire 16 and the third antenna curtain wire constitute a second antenna curtain, a plane in which the first antenna curtain is located and a plane in which the second antenna curtain is located form an included angle of about 154 degrees at the first antenna curtain wire 14 between the first tower-type lightning rod 12 and the second tower-type lightning rod 13, and the first antenna curtain and the second antenna curtain are arranged symmetrically with respect to the first antenna curtain wire 14 and the fourth antenna curtain wire 16.
Further, a third antenna screen 23 is provided between the first end point 20 of the second support 8 and the end point of the first support 7 closer to the first intersection 10, the third antenna screen 23 is formed by arranging a plurality of linear radiators in parallel, similarly, a fourth antenna screen 24 is provided between the second end point of the second support 8 and the end point of the first support 7 closer to the first intersection 10, the fourth antenna screen 24 is formed by arranging a plurality of linear radiators in parallel, and the third antenna screen 23 and the fourth antenna screen 24 are arranged symmetrically about the end point of the first support 7 closer to the first intersection 10. The third antenna curtain 23 and the fourth antenna curtain 24 form a reflecting curtain body, and form a reflecting surface for reflecting the radio frequency signals emitted by the first antenna curtain and the second antenna curtain in a direction approximately perpendicular to the reflecting curtain body, so that the radio frequency signals output by the antenna curtains have directivity, and the gain is increased in a preset direction.
Furthermore, the stay wire on the antenna body is an insulated steel strand and is provided with an insulated egg.
Further, the first support tower 1 and the second support tower 2 are triangular towers with a height of 16.5 meters respectively, the triangular tower with a height of 16.5 meters is formed by 11 sections of tower body structural members with a height of 1.5 meters, the specification of the tower body structural members is round steel with a diameter of 40, and the material of the tower body structural members is galvanized iron members.
In addition, the shell of the impedance converter is a cast aluminum box with the size of 300 multiplied by 200 multiplied by 150, two sets of feed networks are arranged in the cast aluminum box, the feed networks are formed by winding lead wires on magnetic coils, and the resistance value of the impedance converter is 200 omega. An impedance transformer 25 is mounted on the centre line of the screen 5 at the end remote from the support tower.
In addition, each support tower has 6 support tower guys, and support tower guy one end is fixed on support tower, and the other end is fixed on ground, and every two tower body guys constitute a set, and three tower body guys are projected into 120 degrees on ground for fixed support tower makes support tower atress even.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. A short wave directional middle and low elevation angle transmitting antenna is characterized by comprising a supporting tower, a supporting tower stay wire (3), a tower-shaped lightning rod, an antenna curtain (5) and an impedance converter (25),
the antenna curtain (5) is used for radiating radio frequency energy and comprises a first antenna curtain (26), a second antenna curtain (27), a third antenna curtain (23) and a fourth antenna curtain (24), wherein linear radiators in the first antenna curtain (26) and the second antenna curtain (27) are arranged in parallel according to the length characteristic of a logarithmic period; the third antenna curtain (23) and the fourth antenna curtain (24) form a reflecting curtain body to form a reflecting surface, and the reflecting surface is used for reflecting the radio-frequency signals sent by the first antenna curtain (26) and the second antenna curtain (27) in a direction vertical to the reflecting curtain body;
the supporting tower comprises a first supporting tower (1), a second supporting tower (2) and an antenna curtain supporting body (4), the antenna curtain supporting body (4) is used for supporting the antenna curtain (5), the antenna curtain supporting body (4) and the antenna curtain (5) jointly form an antenna body, the first supporting tower (1) and the second supporting tower (2) are used for supporting the antenna body,
the tower-type lightning rod is arranged on the supporting tower, is used for supporting the first antenna curtain (26) and the second antenna curtain (27), and is used for lightning protection of the antenna;
the impedance transformer (25) is arranged at one end of the midline of the antenna screen (5) far away from the supporting tower.
2. A short wave directional medium low elevation emission antenna according to claim 1, wherein the antenna curtain support (4) comprises a first support (7), a second support (8) and a third support (9), the first support (7) and the second support (8) are straight-line shaped, and the first support (7) and the second support (8) are perpendicular to each other and arranged crosswise, the intersection point of the first support (7) and the second support (8) is a first intersection point (10), and the first support tower (1) and the antenna curtain support (4) are connected at the first intersection point (10);
set up second nodical (11) apart from first nodical (10) certain distance on first supporter (7), second support tower (2) with antenna curtain supporter (4) connect in second nodical (11) department.
3. A short wave directional low elevation transmitting antenna according to claim 2, wherein said tower-type lightning conductor comprises a first tower-type lightning conductor (12) and a second tower-type lightning conductor (13),
the first tower-shaped lightning rod (12) takes the first intersection point (10) as a starting point and is formed by extending along the first support tower (1) in a direction which is vertical to the ground and far away from the ground;
the second tower-type lightning rod (13) is formed by taking the second intersection point (11) as a starting point and extending along the second support tower (2) in a direction vertical to the ground and far away from the ground;
first antenna curtain stay wires (14) are connected between the vertex of a first tower-type lightning rod (12) and the vertex of a second tower-type lightning rod (13), fourth antenna curtain stay wires (16) are connected between an end point (15) of a first intersection point (10) and the vertex of the second tower-type lightning rod (13) which are far away from a first supporting body (7), fifth antenna curtain stay wires (17) are connected between the end point of the first supporting body (7) which is close to the first intersection point (10) and the vertex of the first tower-type lightning rod (12), and the first antenna curtain stay wires (14), the fourth antenna curtain stay wires (16) and the fifth antenna curtain stay wires (17) are used for supporting a first antenna curtain (26) and a second antenna curtain (27).
4. A short-wave directional medium-low elevation transmit antenna according to claim 3, characterized in that the third support (9) is in the shape of a straight line segment and the length of the third support (9) is shorter than the second support (8), and the third support (9) is arranged at an end point distant from the first intersection point (10), parallel to the second support (8);
a second antenna curtain wire (21) is connected between the first end point (19) of the third supporting body (9) and the first end point (20) of the second supporting body (8), and the second antenna curtain wire (21) is matched with the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) and is used for supporting the first antenna curtain (26);
a third antenna screen stay wire is connected between the other end of the third supporting body (9) opposite to the first end point (19) and a second end point (22) of the second supporting body (8), and the third antenna screen stay wire is matched with the first antenna screen stay wire (14), the fourth antenna screen stay wire (16) and the fifth antenna screen stay wire (17) and used for supporting a second antenna screen (27).
5. A short wave directional medium and low elevation emission antenna according to claim 4, wherein the projections of the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) on the ground are located on a straight line, and the projections coincide with the projections of the first supporting body (7) on the ground, and the first antenna curtain (26) and the second antenna curtain (27) are symmetrically arranged with the connecting line formed by the first antenna curtain wire (14), the fourth antenna curtain wire (16) and the fifth antenna curtain wire (17) as the central line.
6. A short wave directional middle low elevation angle transmitting antenna according to claim 5, characterized in that the plane of the first antenna screen (26) and the plane of the second antenna screen (27) are intersected by the line formed by the first antenna screen pulling wire (14), the fourth antenna screen pulling wire (16) and the fifth antenna screen pulling wire (17) to form an included angle of 154 degrees.
7. A short wave directional medium low elevation transmitting antenna according to claim 6, characterized in that said third antenna curtain (23) is arranged between the first end point (20) of the second support (8) and the end point of the first support (7) closer to the first intersection point (10);
the fourth antenna screen (24) is arranged between the second end point of the second support body (8) and the end point of the first support body (7) close to the first intersection point (10);
the third antenna screen (23) and the fourth antenna screen (24) are formed by a plurality of linear radiators parallel to the second support body (8) to form a reflecting surface, and the third antenna screen (23) and the fourth antenna screen (24) are symmetrically arranged with the end point of the first support body (7) close to the first intersection point (10) as the center.
8. A short wave directional medium low elevation transmitting antenna according to any of claims 1-7, wherein said impedance transformer has a resistance of 200 Ω.
9. A short wave directional medium low elevation transmitting antenna according to claim 8, wherein the number of said supporting tower wires (3) is 12, wherein there are 6 supporting tower wires on the first supporting tower (1) and the second supporting tower (2), one end of each supporting tower wire is fixed on the supporting tower, the other end of each supporting tower wire is fixed on the ground, every two supporting tower wires form a group, and three groups of supporting tower wires form 120 degree projection on the ground.
10. Short-wave directional medium-low elevation transmitting antenna according to claim 9, characterized in that the height of said first (1) and second (2) support towers is 16.5 meters and the distance of the projection of the first (1) and second (2) support towers on the ground is 6 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221507292.4U CN217641791U (en) | 2022-06-16 | 2022-06-16 | Short wave directional middle-low elevation angle transmitting antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221507292.4U CN217641791U (en) | 2022-06-16 | 2022-06-16 | Short wave directional middle-low elevation angle transmitting antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217641791U true CN217641791U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221507292.4U Active CN217641791U (en) | 2022-06-16 | 2022-06-16 | Short wave directional middle-low elevation angle transmitting antenna |
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| Country | Link |
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| CN (1) | CN217641791U (en) |
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2022
- 2022-06-16 CN CN202221507292.4U patent/CN217641791U/en active Active
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