A Ku / Ka dual-band shared portable communication antenna

Abstract

The present invention discloses a Ku / Ka dual-frequency shared portable communication antenna, belonging to the field of antenna technology. The antenna mount is a U-shaped frame, including a bottom plate and arms located on both sides of the upper surface of the bottom plate; an azimuth gear is fixed on the top of the support center, the azimuth motor is located on one side of the azimuth gear, and the azimuth output gear at the end of the azimuth motor output shaft is meshed with the azimuth gear; the housing of the azimuth motor is fixedly connected to the bottom plate of the antenna mount; a pitch pulley connected to its bearing is provided on the outer side of one arm of the antenna mount, and the shaft of the pitch pulley located on the inner side of the arm is fixedly connected to the box; the other arm of the antenna mount is connected to the corresponding wall bearing of the box; a pitch motor is also fixedly provided at the bottom of the antenna mount, and the output shaft of the pitch motor drives the pitch pulley to rotate through a belt. The present invention realizes rapid feed switching and avoids the winding of the wire group, and has a simple and light structure and high reliability.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a Ku / Ka dual-frequency shared portable communication antenna. Background Art

[0002] With the rapid development of satellite communication technology, the demand for Ku / Ka dual-band antennas is becoming increasingly strong. Traditional dual-band automatic portable communication antennas have the following limitations:

[0003] 1. Most systems use two independent feed sources. Replacing the feed source requires manual disassembly and assembly of the feed source and amplifier, which is complex and time-consuming, and cannot meet the requirements of emergency situations. The structural design is also cumbersome and heavy.

[0004] 2. The power amplifier and waveguide are mostly installed on the outside of the antenna mount, which takes up a large space and is unsafe, and the structural design is relatively bulky.

[0005] 3. The drive chain of the antenna mount often has cables wrapped around the azimuth mechanism. Summary of the Invention

[0006] In view of this, the present invention provides a Ku / Ka dual-band shared automatic portable communication antenna. The antenna realizes fast feed switching, avoids wire entanglement, and has a simple and lightweight structure and high reliability.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A portable Ku / Ka dual-band communication antenna comprises an antenna reflector, a Ku / Ka integrated feed, a Ku power amplifier, a Ka power amplifier, and an antenna mount. The antenna also comprises legs and a support center, wherein the legs are hinged to the side walls of the support center. The Ku / Ka integrated feed, the Ku power amplifier, and the Ka power amplifier are integrated into the same housing. The antenna mount is a U-shaped frame comprising a base plate and arms located on either side of the upper surface of the base plate. An azimuth gear is fixed to the top of the support center, an azimuth motor is located on one side of the azimuth gear, and an azimuth output gear at the end of the azimuth motor output shaft meshes with the azimuth gear. The housing of the azimuth motor is fixedly connected to the base plate of the antenna mount.

[0009] A pitch pulley connected to a bearing is provided on the outer side of one of the arms of the antenna mount, and the shaft of the pitch pulley located on the inner side of the arm is fixedly connected to the box; the other arm of the antenna mount is connected to a bearing on the corresponding wall of the box; a pitch motor is also fixedly provided at the bottom of the antenna mount, and the output shaft of the pitch motor drives the pitch pulley to rotate through a belt.

[0010] Furthermore, it also includes an upper terminal, a lower terminal and a fixed shell; the fixed shell passes through the axial center hole of the azimuth gear and is fixed to the support center; the upper terminal is located at the center of the top of the fixed shell and is connected to the fixed shell bearing, and the lower terminal is located on the bottom side of the fixed shell and is fixedly connected to the fixed shell; a terminal motor is also provided in the fixed shell, and the terminal motor drives the upper terminal to rotate around the central axis of the fixed shell, and the upper terminal and the lower terminal are connected by a slip ring.

[0011] Furthermore, the azimuth rotation angle is the same as the rotation angle of the upper terminal, but the rotation direction is opposite.

[0012] Furthermore, the antenna reflecting surface is a petal-type structure, and adjacent petals are connected by a locking structure; a first hinge component is provided on the central body, and a second hinge component is provided on the petals, and the first hinge component and the second hinge component are assembled by plugging.

[0013] Furthermore, the Ku / Ka integrated feed is a Ku / Ka switching dual-band feed network, including a Ku / Ka band switching microwave network 2, a Ku band polarization rotation mechanism 3, two Ka band filters 4 and a fixed platform 6.

[0014] The two Ka-band filters 4 and the Ku-band polarization rotation mechanism 3 are both arranged below the fixed platform. The two Ka-band feeder ports reserved on the fixed platform are connected to the two Ka-band filters 4 through waveguide feeders in a one-to-one correspondence, and the Ku-band feeder port reserved on the fixed platform is connected to the Ku-band polarization rotation mechanism.

[0015] The Ku / Ka band switching microwave network 2 is movably arranged on a fixed platform. The Ku / Ka band switching microwave network 2 is a rotor block used for free rotation to perform port switching. The Ku-band signal channel and the Ka-band signal channel that pass through the block are arranged in parallel in the rotor block. The Ka-band signal channel is connected to the phase shifter. The output port of the phase shifter switched by rotating the rotor block is connected to the Ka feeder port, or the output port of the Ku-band signal channel switched by rotating the rotor block is connected to the Ku feeder port.

[0016] Furthermore, two limit position contact switches are provided on the outer side of the arm wall on the pitch pulley side, and a baffle corresponding to the limit position contact switch is provided on the outer side of the pitch pulley; at the limit position of pitch, the baffle of the pitch pulley abuts against the corresponding limit contact switch.

[0017] Furthermore, a rotating pressing block is provided on the outer side of the arm wall on the pitch pulley side, and one side of the belt is pressed on one side of the rotating pressing block; the central axis of the rotating pressing block is perpendicular to the arm wall.

[0018] Furthermore, a heat dissipation fan is provided at the bottom of the box body, and a heat dissipation duct for enhancing heat dissipation is provided behind the heat dissipation fan.

[0019] The beneficial effects of the above technical solution of the present invention are:

[0020] 1. The antenna of the present invention adopts a Ku / Ka integrated feed design and has a fast feed switching function. It does not need to disassemble the feed and power amplifier, and can efficiently switch frequency bands. The antenna reflector adopts a petal form and can be assembled efficiently and accurately through a locking device with rapid positioning. It is quick and convenient to store and has a small size.

[0021] 2. The azimuth drive of the mount of the present invention uses a slip ring device to avoid cable entanglement, resulting in a compact and lightweight structure and reliable self-locking. The integrated power amplifier and integrated feed source are integrated into the box to achieve pitching through a transmission belt and pulley, making the structure more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural front view of an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the pitch transmission structure according to an embodiment of the present invention;

[0024] Figure 3 This is a diagram of the internal structure of the transmission according to an embodiment of the present invention;

[0025] Figure 4 This is the overall structural diagram of the Ku / Ka integrated feed in an embodiment of the present invention.

[0026] Figure 5 1. This is an axial structural diagram of the Ku / Ka integrated feed according to an embodiment of the present invention;

[0027] Figure 6 for Figure 4 Side view of the rotating mechanism;

[0028] Figure 7 for Figure 4 Cross-sectional structural diagram of the central rotating mechanism;

[0029] Figure 8 for Figure 4 Cross-sectional structural diagram of the central rotating mechanism;

[0030] Figure 9 for Figure 4 Figure 2. Structure diagram of the toggle switch.

[0031] In the figure: horn feed 1, Ku / Ka band switching microwave network 2, Ku-band polarization rotation mechanism 3, Ka-band filter 4, rotation, rocker arm 2-4-1, lever 2-4-2, central waveguide 5-1, fixed tube 5-2, rotation joint 5-3, signal input coupling port 5-4, signal transceiver side port 5-5, rotor matching block 5-6, side waveguide channel 5-7, antenna reflector 11, Ku / Ka integrated feed 12, Ka power amplifier 13, Ku power amplifier, antenna terminal 15, antenna mount 16, support leg 17, support center 18, box 19, cooling fan 20, right contact switch 21, right baffle 22, belt 23, left contact switch 24, left baffle 25, rotating pressure block 26, azimuth motor 14-1, pitch motor 14-2, fixed housing 14-3. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Reference Figures 1 to 3 This embodiment provides a Ku / Ka dual-band automatic portable satellite communication antenna, which includes an antenna reflector 11, a Ku / Ka integrated feed source 12, a Ka power amplifier 13, a Ku power amplifier 14, an antenna terminal 15, an antenna mount 16, and support legs 17. The Ku / Ka integrated feed source 12, Ka power amplifier 13, Ku power amplifier 14, and antenna terminal 15 are mounted on antenna mount 16 and connected to support legs 17 via a quick positioning mechanism. The antenna reflector 1 is mounted on the top of a housing 19. A cooling fan 20 is located at the bottom of the housing.

[0035] In this embodiment, the legs are hinged to the side walls of the support center; the Ku / Ka integrated feed and the Ku and Ka amplifiers are integrated in the same box; the antenna mount is a U-shaped frame, including a base plate and arms located on both sides of the upper surface of the base plate; an azimuth gear is fixed to the top of the support center, the azimuth motor 14-1 is located on one side of the azimuth gear and the azimuth output gear at the end of the azimuth motor output shaft is engaged with the azimuth gear; the housing of the azimuth motor is fixedly connected to the base plate of the antenna mount.

[0036] A pitch pulley connected to its bearing is provided on the outer side of one of the arms of the antenna mount, and the shaft of the pitch pulley located on the inner side of the arm is fixedly connected to the box; the other arm of the antenna mount is connected to the corresponding wall bearing of the box; a pitch motor 14-2 is also fixedly provided at the bottom of the antenna mount, and the output shaft of the pitch motor drives the pitch pulley to rotate through a belt.

[0037] The antenna reflector is a six-petal structure, forming a neatly shaped six-petal structure when disassembled for easy storage. A locking and hinge mechanism with quick positioning allows for efficient and accurate assembly. The antenna reflector is a six-petal structure, with adjacent petals connected by a locking mechanism. A first hinge assembly is provided on the central body, and a second hinge assembly is provided on the petals. These two components are assembled by plugging.

[0038] The feed is designed for quick installation and removal; it is connected to the waveguide output port via screws. Two limit position contact switches, a left contact switch 24 and a right contact switch 21, are located on the outer side of the support arm on the pitch pulley side. Baffles corresponding to the limit position contact switches, a left baffle 25 and a right baffle 22, are located on the outer side of the pitch pulley. At the extreme pitch positions, the pitch pulley baffles abut the corresponding limit position contact switches.

[0039] A rotating pressing block is further provided on the outer side of the arm wall on the pitch pulley side. One side of the belt 23 is pressed on one side of the rotating pressing block 26. The central axis of the rotating pressing block is perpendicular to the arm wall.

[0040] A heat dissipation fan 20 is provided at the bottom of the box, and a heat dissipation duct is provided behind the heat dissipation fan for enhancing heat dissipation.

[0041] The feed network is a Ku / Ka integrated design, which can be automatically switched by control; the specific switching method is referred to Figures 4 to 9 .

[0042] The power amplifier is a Ku / Ka integrated design, integrating the Ku power amplifier and the Ka power amplifier with the Ku / Ka integrated feed source 12 in one box, which has a compact structure and improves the feed switching efficiency; the box after the power amplifier and the feed source are integrated is connected to the pitch mechanism through a transmission chain, and the structure is more convenient.

[0043] The azimuth mechanism also utilizes a slip ring device, which offers a compact structure and prevents cable entanglement. The fixed housing passes through the axial center hole of the azimuth gear and is fixed to the support center. The upper terminal is located at the center of the top of the fixed housing and is connected to the fixed housing bearing. The lower terminal is located on one side of the bottom of the fixed housing 14-3 and is fixedly connected to the fixed housing. A wiring motor is also provided within the fixed housing, which drives the upper terminal to rotate around the central axis of the fixed housing. The upper and lower terminals are connected via a slip ring. In this embodiment, the wires within the box are connected via the upper terminal. Slip rings at different heights can be installed on the upper terminal for wires with different input signals.

[0044] The legs are foldable. They are tripod-shaped and made of carbon fiber, which has high rigidity, strength and light weight. Each leg can be rotated and folded around the axis, making the stowage small and fast.

[0045] The connection and fixation between the antenna reflector, antenna mount and legs all adopt a quick tool-free installation method, and can be quickly disassembled and installed by hand.

[0046] In this embodiment, two limit position contact switches are provided on the outer side of the arm wall on the pitch pulley side, including a left contact switch and a right contact switch; the outer side surface of the pitch pulley is provided with baffles corresponding to the limit position contact switches, including a left baffle and a right baffle; at the limit position of pitch, the baffle of the pitch pulley abuts against the corresponding limit contact switch.

[0047] A rotating pressing block is further provided on the outer side of the support arm wall on the pitch pulley side, and one side of the belt is pressed on one side of the rotating pressing block; the central axis of the rotating pressing block is perpendicular to the support arm wall.

[0048] A heat dissipation fan is provided at the bottom of the box body, and a heat dissipation duct for enhancing heat dissipation is provided behind the heat dissipation fan.

[0049] Reference Figures 4 to 9The Ku / Ka integrated feed source of this embodiment adopts a Ku / Ka switching dual-band feed network, which is composed of a Ku / Ka dual-band feed source 1, a Ku / Ka band switching microwave network 2, a Ku-band polarization rotation mechanism 3, two Ka-band filters 4, and a Ka-band waveguide feed 5. The Ku / Ka switching dual-band feed network has six waveguide ports and one radiation port, two Ka feeder ports and one Ku feeder port reserved on the fixed platform, the Ku feeder port is located between the two Ka feeder ports, the two Ka-band filters 4 and the Ku-band polarization rotation mechanism 3 are both arranged below the fixed platform, the Ku / Ka band switching microwave network 2 is movably arranged on the fixed platform, the Ku / Ka band switching microwave network 2 is a rotor block for freely rotating to switch ports, the fixed platform is connected to the rotating shaft through a bearing, the rotating shaft is fixedly connected to the rotor block, and the rocker arm is connected to the rotating shaft. A fixed connection is provided, and a lever 2-4-2 is vertically fixed at one end of the rocker arm. By moving the lever, the rocker arm is driven to swing and the rotor block is driven to rotate. At this time, the position of the fixed platform is fixed. A Ku-band signal channel and a Ka-band signal channel are provided in the rotor block and penetrate the block. The Ka-band signal channel is connected to the phase shifter. The phase shifter has an inverted Y-shaped channel. The phase shifter is also provided in the rotor block. The phase shifter is a partition phase shifter. The phase shifter extends two output channels. The two output channels are connected to the Ka feeder ports one by one. During the rotation of the rotor block, the output port of the phase shifter can be switched to be connected to the Ka feeder port at will, or the output port of the Ku-band signal channel can be switched to be connected to the Ku feeder port by rotating the rotor block. The Ku feeder port reserved on the fixed platform is connected to the Ku-band polarization rotation mechanism; the two Ka feeder ports reserved on the fixed platform are connected to the two Ka-band filters 4 one by one through the waveguide feeder.

[0050] The Ka-band filter 4 is a three-port one-to-two filter.

[0051] A cover cylinder is provided outside the rotor block and is fixedly mounted on a fixed platform. A common port is reserved on the cover cylinder and a horn feed is mounted outside the common port of the cover cylinder. The rotating rotor block is switched to connect the Ku-band signal channel to the common port or the rotating rotor block is switched to connect the Ka-band signal channel to the common port.

[0052] The Ku / Ka switching dual-band feed network adopts a time-sharing working mode, that is, when selecting Ku-band operation or Ka-band operation, the working frequency band is switched by toggling the switching device. The Ku-band working polarization is linear polarization, and the Ka-band working polarization is circular polarization. The linear polarization plane adjustment function of the Ku band is realized through the Ku-band polarization rotation mechanism. The entire Ku / Ka switching dual-band feed network has a simple and compact structure.

[0053] The Ku-band polarization rotation mechanism includes a rotating mechanism for adjusting signal polarization matching and a rotating joint 5-3 for transmitting signals. The rotating mechanism includes a central waveguide 5-1 as a rotor and a stator 5-2 as a stator. The central waveguide is movably mounted in the inner cavity of the stator. A rotor matching block is fixedly connected to the side wall of the central waveguide, and a stator matching block is fixedly connected to the inner wall of the stator. A side waveguide channel 5-7 extending in a circular ring along the outer circumference of the central waveguide is enclosed between the rotor matching block and the stator matching block. The two ends of the side waveguide channel are respectively connected to the signal input coupling port 5-4 reserved on the central waveguide and the signal transceiver side port 5-5 reserved on the stator. The polarization angle of the side waveguide channel is changed by changing the angle between the rotor matching block and the stator matching block. A common port is reserved at the top of the central waveguide, and the straight port at the bottom end of the central waveguide is connected to the waveguide port of the rotating joint.

[0054] A waveguide slot is provided on the outer wall of the central waveguide. A rotor matching block 5-6 is provided at one end of the waveguide slot, and a stator matching block is provided at the other end of the waveguide slot. The stator cylinder closes the top surface of the waveguide slot. The stator matching block and the rotor matching block close both ends of the waveguide slot to form a side waveguide channel. The input coupling port is opposite to the rotor matching block, and the signal receiving and transmitting side end is opposite to the stator matching block.

[0055] The rotor matching block is a convex block with a stepped boss, and the stepped boss of the rotor matching block is opposite to the input coupling port. The stator matching block is a convex block with a stepped boss, and the stepped boss of the stator matching block is opposite to the side port.

[0056] The operating frequency range of the Ku / Ka dual-band feed is Ku-band coverage of transmit and receive frequencies and Ka-band coverage of transmit and receive frequencies.

[0057] The contents not described in detail in the specification of the present invention belong to the common knowledge of professionals in this field.

[0058] In this embodiment of the present invention, a Ku / Ka switching dual-band feed network was designed and manufactured for use with a 0.9-meter antenna. Measured results show that the feed network exhibits excellent electrical performance, with a Ka-band receive frequency range of 19.6-21.2 GHz and a transmit frequency range of 29.4-31 GHz, with a Ka-band transmit-receive axial ratio of less than 1 dB. In the Ku-band receive frequency range of 12.25-12.75 GHz and a Ku-band transmit frequency range of 14-14.5 GHz, the cross-polarization isolation in the Ku transmit-receive band is less than -35 dB, the radiation pattern is rotationally symmetrical, and the first sidelobe of the Ku / Ka dual-band antenna is less than -14 dB, with a voltage standing wave ratio of less than 1.3, meeting all required performance indicators.

[0059] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by any relevant technical personnel familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

Claims

1. A Ku / Ka dual-frequency shared portable communication antenna, comprising an antenna reflector, a Ku / Ka integrated feed, a Ku power amplifier, a Ka power amplifier and an antenna mount; characterized in that: It also includes legs and a support center, wherein the legs are hinged to the side walls of the support center; the Ku / Ka integrated feed, Ku amplifier, and Ka amplifier are integrated in the same box; the antenna mount is a U-shaped frame, including a bottom plate and arms located on both sides of the upper surface of the bottom plate; an azimuth gear is fixed to the top of the support center, the azimuth motor is located on one side of the azimuth gear, and the azimuth output gear at the end of the output shaft of the azimuth motor is meshed with the azimuth gear; The housing of the azimuth motor is fixedly connected to the bottom plate of the antenna mount; The outer side of one arm of the antenna mount is provided with a pitch pulley connected to its bearing, and the shaft of the pitch pulley located on the inner side of the arm is fixedly connected to the box; the other arm of the antenna mount is connected to the corresponding wall bearing of the box; the bottom of the antenna mount is also fixedly provided with a pitch motor, and the output shaft of the pitch motor drives the pitch pulley to rotate through a belt; The antenna reflector is a petal-type structure, and adjacent petals are connected by a locking structure; a first hinge component is provided on the central body, and a second hinge component is provided on the petals, and the first hinge component and the second hinge component are assembled by plugging; The Ku / Ka integrated feed is a Ku / Ka switching dual-band feed network, comprising a Ku / Ka band switching microwave network (2), a Ku band polarization rotation mechanism (3), two Ka band filters (4) and a fixed platform (6). The two Ka-band filters (4) and the Ku-band polarization rotation mechanism (3) are both arranged below the fixed platform; the two Ka-band feeder ports reserved on the fixed platform are connected to the two Ka-band filters (4) via waveguide feeders in a one-to-one correspondence; and the Ku-band feeder port reserved on the fixed platform is connected to the Ku-band polarization rotation mechanism; The Ku / Ka band switching microwave network (2) is movably arranged on a fixed platform. The Ku / Ka band switching microwave network (2) is a rotor block for freely rotating to switch ports. A Ku band signal channel and a Ka band signal channel that penetrate the block are arranged in parallel in the rotor block. The Ka band signal channel is connected to a phase shifter. The output port of the phase shifter switched by rotating the rotor block is connected to a Ka feeder port, or the output port of the Ku band signal channel switched by rotating the rotor block is connected to a Ku feeder port.

2. A Ku / Ka dual-band shared portable communication antenna according to claim 1, characterized in that: It also includes an upper terminal, a lower terminal and a fixed shell; the fixed shell passes through the axial hole of the azimuth gear and is fixed to the support center; the upper terminal is located at the center of the top of the fixed shell and is connected to the fixed shell bearing, and the lower terminal is located on one side of the bottom of the fixed shell and is fixedly connected to the fixed shell; a terminal motor is also provided in the fixed shell, and the terminal motor drives the upper terminal to rotate around the central axis of the fixed shell, and the upper terminal and the lower terminal are connected by a slip ring.

3. The Ku / Ka dual-band shared portable communication antenna according to claim 2, characterized in that: The azimuth rotation angle is the same as the rotation angle of the upper terminal, but the rotation direction is opposite.

4. The Ku / Ka dual-band shared portable communication antenna according to claim 1, characterized in that: Two limit position contact switches are arranged on the outer side of the support arm wall surface on the pitch pulley side, and a baffle corresponding to the limit position contact switch is arranged on the outer side surface of the pitch pulley; at the limit position of pitch, the baffle of the pitch pulley abuts against the corresponding limit position contact switch.

5. The Ku / Ka dual-band shared portable communication antenna according to claim 1, characterized in that: A rotating pressing block is also arranged outside the supporting arm wall surface on the pitch pulley side, and one side of the belt is pressed on one side of the rotating pressing block; the central axis of the rotating pressing block is perpendicular to the supporting arm wall surface.

6. The Ku / Ka dual-band shared portable communication antenna according to claim 1, characterized in that: A heat dissipation fan is also provided at the bottom of the box body, and a heat dissipation air duct for enhancing heat dissipation is also provided behind the heat dissipation fan.

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