Cross oscillator medium-wave antenna system

Abstract

The utility model belongs to the technical field of medium-wave antennas, and particularly relates to a cross oscillator medium-wave antenna system, which comprises two sets of transmitting systems and two groups of oscillator arms, and the two groups of oscillator arms are electrically connected with the two sets of transmitting systems respectively. The transmitting system comprises a transmitter, a control system and a transmission feeder line; the number of the oscillator arms in one group is two, the two groups of oscillator arms are arranged in a crossed mode, the ends, away from each other, of the two oscillator arms in the same group are the tail ends of the oscillator arms, the ends, close to each other, of the two oscillator arms in the same group are the middle ends of the oscillator arms, and the heights of the tail ends of the oscillator arms can be adjusted up and down. According to the utility model, switching between a linear polarization working state and a circular polarization working state can be realized, sky wave local coverage of medium-wave broadcast and switching capability of multiple working modes are realized by emitting sky wave signals upwards and reflecting the sky wave signals through an ionized layer, and the coverage range, the coverage uniformity and the coverage efficiency of the signals can be improved, especially the same-frequency anti-interference effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medium wave antenna, concretely relates to a cross cross dipole medium wave antenna system. BACKGROUND

[0002] As a traditional broadcasting mode in China, the medium wave radio basically adopts the vertical polarization antenna tuning system, and realizes the local coverage by using the ground wave. However, the coverage effect is influenced by the topography and the ground buildings, and there are many blind spots and short coverage distance problems, and the coverage is uneven, and the signal is easily interfered by the same frequency signal at night

[0003] In order to solve the above problems, the utility model provides a cross cross dipole medium wave antenna system design scheme, the design of the system utilizes the reflection of electromagnetic wave in the ionosphere, realizes the local coverage of medium wave radio. The antenna tuning system realizes the completely independent operation of two pairs of antenna dipoles through two independent transmitting links, and realizes the real-time switching of single dipole, double dipole and circular polarization and other transmission modes by relying on the precise carrier phase control, and the system does not use the power divider and the phase shift network. The flexibility and multi-mode working ability can simplify the structure of the transmitting system, and improve the anti-same frequency interference ability, the coverage range, the coverage uniformity and the coverage efficiency of the medium wave antenna system. UTILITY MODEL CONTENTS

[0004] The utility model discloses a cross cross dipole medium wave antenna system, can realize the switching of linear polarization and circular polarization working state, transmits the sky wave signal upward, realizes the sky wave wide range local coverage of medium wave radio through the ionosphere reflection, the switching ability of multiple working modes can improve the coverage range, the coverage uniformity and the coverage efficiency of signal, especially the same frequency anti-interference effect.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A cross cross dipole medium wave antenna system, including two sets of transmitting systems and two groups of dipole arms, two groups of dipole arms are electrically connected with two sets of transmitting systems respectively;

[0007] The transmitting system includes a transmitter, a control system and a transmission feeder;

[0008] The number of one group of dipole arms is two, two groups of dipole arms are arranged in cross, and the end of two dipole arms of the same group away from each other is the end of the dipole arm, and the height of the end of the dipole arm can be adjusted up and down.

[0009] Further, the intermediate support tower is fixedly connected with two stacked barlows, the ends of the vibrator arms are connected with the end support towers through insulation connecting structures, and the two vibrator arms of the same group are connected with the barlows through the intermediate ends of the vibrator arms.

[0010] The technical effects achieved by the cross-shaped vibrator medium wave antenna system are as follows:

[0011] The cross-shaped vibrator medium wave antenna system can realize switching of linear polarization and circular polarization working states, can realize medium wave broadcast sky wave local coverage through upward emission of sky wave signals and ionospheric reflection, and can improve the coverage range, coverage uniformity and coverage efficiency of signals, and has good same-frequency anti-interference effect. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Figure 2 is a link diagram of the utility model

[0014] Figure 3 is the utility model Figure 1 is a local enlarged view of A in the utility model;

[0015] Figure 4 is the utility model Figure 3 is a local enlarged view of B in the utility model.

[0016] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0017] 1, end support tower; 2, insulation connecting structure; 3, vibrator arm; 4, barlow; 5, intermediate support tower; 6, electric push rod; 7, U-shaped frame; 8, sleeve; 9, rotating rod. DETAILED DESCRIPTION

[0018] In order to make the purposes and advantages of the utility model more clear and apparent, the utility model will be specifically described below in combination with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the specific protection scope requested by the utility model.

[0019] Embodiment one:

[0020] As Figures 1-2As shown, a kind of cross-interdigital wave antenna system, including intermediate support tower 5 and four end support towers 1 located in the side of intermediate support tower 5, four end support towers 1 are in the horizontal plane with intermediate support tower 5 as center and are annular array, and four end support towers 1 are divided into two groups, and the number of end support tower 1 in each group is two, and two end support towers 1 in the same group are symmetrically arranged with intermediate support tower 5 as center;

[0021] The upper side of intermediate support tower 5 is fixedly connected with two stacked baluns 4, that is, one balun 4 is fixedly connected to the upper side of intermediate support tower 5, and the other balun 4 is fixedly connected to the upper side thereof, and one group of interdigital arms 3 is directly connected to the outer side of the two baluns 4, and two groups of interdigital arms 3 are connected to two groups of end support towers 1, and two groups of interdigital arms 3 are cross-shaped in the horizontal plane, and two groups of interdigital arms 3 are cross-shaped in the vertical plane, so that two groups of interdigital arms 3 remain completely independent, and through the optimized layout and phase control of interdigital arms 3, the antenna system can significantly improve the transmission quality of signals and reduce signal attenuation and interference.

[0022] Here, one input end and two output ends are provided on one balun 4, and two interdigital arms 3 in the same group are directly connected to the two output ends of the balun 4.

[0023] Moreover, bolt connection points are provided at the output end positions of the balun 4, and the interdigital arm 3 is connected together through the bolt connection points.

[0024] Specifically, the number of one group of interdigital arms 3 is two, and two interdigital arms 3 are symmetrically arranged with intermediate support tower 5 as center, and the end of two interdigital arms 3 close to each other is the middle end of interdigital arm 3, and the middle end of interdigital arm 3 is in feeding connection with the balun 4, and the end of two interdigital arms 3 far away from each other is the end of interdigital arm 3, and the end of interdigital arm 3 is connected with end support tower 1 through insulating connecting structure 2, and the end of interdigital arm 3 can be supported by end support tower 1, and the insulating connecting structure 2 can maintain the insulating state between end support tower 1 and interdigital arm 3.

[0025] Here, the interdigital arm 3 can adopt various forms such as single metal wire or multi-metal wire cage, so that it can be suitable for communication of different frequencies and power levels.

[0026] And the height of the end of the oscillator arm 3 can be adjusted up and down, by adjusting the height of the end of the oscillator arm 3, the system works in horizontal, inverted V or positive V state, through the control of the height of the end of the oscillator arm 3, the change of linear polarization and circular polarization emission mode can be realized, this design not only improves the flexibility of the antenna, but also enhances its ability to adapt to different propagation environment and receiving equipment demand. Compared with the traditional circularly polarized antenna, the horizontally arranged cross-shaped oscillator antenna system can flexibly adjust the emission mode according to the actual demand, meet the diversified application scenarios, the cross-shaped oscillator medium wave antenna system provides more flexible and efficient polarization mode selection in medium wave frequency band, adopts sky wave form for large-scale local uniform coverage in medium wave broadcast, and has excellent anti-interference performance, which meets the higher requirements of modern communication system on antenna performance.

[0027] The length, ground clearance and end support tower 3, the spacing of the intermediate support tower 5 of the system are related to the working frequency of the system.

[0028] Among them, the balun 4 is installed at the top of the intermediate support tower 5, which completes the matching of the antenna impedance and the conversion from unbalanced to balanced feed mode; the input end of the balun 4 is connected with the transmitting system; the output end of the balun 4 is connected with the oscillator arm 3 feed;

[0029] The transmitting system includes a transmitter, a control system and a transmission feeder, the control system, the transmitter, the transmission feeder, the balun 4 and the oscillator arm 3 are electrically connected in sequence, the two sets of control systems, the transmitter, the transmission feeder and the balun 4 are independent of each other, the control system serves as a phase control unit and has precise phase control function, which realizes synchronous and precise phase control of the carrier waves of the two transmitters, cooperates with the structure of the cross-shaped oscillator medium wave antenna system, and the cross-shaped oscillator medium wave antenna system can realize flexible adjustment of the polarization mode and polarization direction (electric field vector direction) of transmission, can realize the setting of various polarization modes and polarization directions, and realizes the maximization of transmission efficiency in various actual environments.

[0030] The cross-shaped oscillator medium wave antenna system is relatively simple in design, does not use power divider and phase shift network, realizes the coordinated work of the two transmission links, so that the antenna can work in linear polarization, elliptical polarization, circular polarization and other polarization modes, and the polarization electric field vector direction can also be precisely adjusted, which makes the antenna adapt to the changeable electromagnetic environment and different receiving equipment requirements, improves the coverage range and quality of the signal, simplifies the structure of the antenna tuning system of the transmitting system, is very convenient to install and maintain, and reduces the operation cost. The system realizes coverage through ionospheric reflection, is not affected by topography, can effectively cope with complex terrain and urban environment, and provides stable and blind-free local uniform coverage of medium wave broadcast signals.

[0031] The application adopts two pairs of horizontally placed vibrator arms 3 in a cross shape, and realizes the change of linear polarization and circular polarization emission modes through precise phase control technology, as shown in the drawings Figure 2 The antenna system can realize the following four working modes:

[0032] Working mode a: the system presents a linear polarization working mode of 0 degrees or 90 degrees in the horizontal plane.

[0033] Working mode b: the system presents orthogonal linear polarization working modes in the horizontal plane.

[0034] Working mode c: the system presents a circular polarization working mode in the horizontal plane.

[0035] Working mode d: through precise, rapid and cyclic phase shift control of the carrier of the emission system, a linear polarization working mode of continuous rotation of the polarization electric field vector direction in the horizontal plane is realized.

[0036] Embodiment two:

[0037] As shown in the drawings, one kind of end height adjustment mode of the vibrator arm 3 is disclosed in the embodiment, which is that the upper end of the end support tower 1 is fixedly connected with an electric push rod 6, the piston rod of the electric push rod 6 is fixedly connected with a U-shaped frame 7, and the insulating connecting structure 2 is installed on the U-shaped frame 7. Figures 1-4 Meanwhile, the outer side of the insulating connecting structure 2 can also be slidably connected with a sleeve 8, both sides of the sleeve 8 are fixedly connected with a rotating rod 9, and the U-shaped frame 7 and the rotating rod 9 are rotationally connected.

[0038] At this time, the U-shaped frame 7 and the sleeve 8 can be vertically moved by starting the electric push rod 6, the height of the insulating connecting structure 2 is adjusted when the sleeve 8 is vertically moved, so that the end height of the vibrator arm 3 is adjusted, and the stability of the insulating connecting structure 2 can be improved by limiting the insulating connecting structure 2 through the sleeve 8.

[0039] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the present application, and these improvements and refinements should also be regarded as the protection range of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A cross-turnstile monopole waveguide antenna system, characterized by: The two sets of transmitting systems and the two groups of vibrator arms (3) are electrically connected respectively; The number of the vibrator arms (3) in one group is two, and the two groups of the vibrator arms (3) are arranged in a cross shape, the ends of the two vibrator arms (3) in the same group away from each other are the ends of the vibrator arms (3), and the height of the ends of the vibrator arms (3) can be adjusted up and down.

2. A cross-turnstile patch-in-wave antenna system according to claim 1, characterized in that: The four end support towers (1) are arranged in a circular array with the intermediate support tower (5) as the center on the horizontal plane, the upper side of the intermediate support tower (5) is fixedly connected with two stacked baluns (4), the ends of the vibrator arms (3) are connected with the end support towers (1) through the insulating connecting structures (2), the ends of the two vibrator arms (3) in the same group close to each other are the middle ends of the vibrator arms (3), the middle ends of the vibrator arms (3) are in feeding connection with the baluns (4), and the input ends of the baluns (4) are connected with the transmitting systems.

3. A cross-turnstile patch-in-wave antenna system according to claim 1, wherein: The vibrator arms (3) adopt single metal wire or multi-metal wire cage.

4. A cross-turnstile patch-in-wave antenna system according to claim 1, wherein: The transmitting system comprises a transmitter, a control system and a transmission feeder, and the control system, the transmitter, the transmission feeder, the balun (4), the vibrator arm (3) are electrically connected in sequence.

5. A cross-turnstile patch-in-wave antenna system according to claim 2, wherein: The upper end of the end support tower (1) is fixedly connected with an electric push rod (6), the piston rod of the electric push rod (6) is fixedly connected with a U-shaped frame (7), and the insulating connecting structure (2) is installed on the U-shaped frame (7).

6. A cross-turnstile patch-in-wave antenna system according to claim 5, wherein: The outer side of the insulating connecting structure (2) is slidably connected with a sleeve (8), both sides of the sleeve (8) are fixedly connected with rotating rods (9), and the U-shaped frame (7) and the rotating rods (9) are rotationally connected.

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