CN2178389Y

CN2178389Y - Half ball paraboloid U.V compatible full frenquency channel steering antenna

Info

Publication number: CN2178389Y
Application number: CN 93237947
Authority: CN
Inventors: 徐允昭; 王纯音
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-11
Filing date: 1993-11-11
Publication date: 1994-09-28
Anticipated expiration: 2003-11-11

Abstract

The utility model relates to a hemispherical parabolic U and V compatible full frequency channel steering antenna which comprises a mixing and transforming device of the existing antenna, an adjustable gain amplifier, a gripper mechanism and a steering mechanism which is used for controlling the rotation of the antenna. The utility model is characterized in that 4 to 6 metal rings are uniformly arranged on a hemispherical parabolic reflector arranged on a circular arc-shaped support frame, and five pairs of mutually parallel logarithmic dipole antenna arrays are horizontally arranged on the frame of the support bar arranged on the focal axis plane of the hemispherical parabolic reflector. A swing arm with circular arc-shaped holes, which is gripped between the two lug seats, is arranged on the upper cover of the steering driving mechanism, and the swing arm with circular arc-shaped holes is fixed tightly by handle screw bolts to adjust the pitching angle of the antenna.

Description

Half ball paraboloid U.V compatible full frenquency channel steering antenna

The compatible all-channel balcony of parabolic U, the V of hemisphere formula turns to television receiving antenna.

The outdoor balcony formula television receiving antenna that is occurred at present, as the balcony formula position controlled rotary antenna that CN89215166 and CN92218140.3 disclosed, they all are partly to be made of reception antenna, U, V mixing transformation device, variable gain amplifier, feed system, steering mechanism, clamping device and control box etc.

Above-mentioned two kinds of antennas all adopt the rectangular metal frame antenna to finish to the reception of VHF band TV signal.The uhf band antenna part all with the two-wire system oscillator as active dipole, the antenna of CN89215166 wherein, its two-wire system active dipole front does not add director, directive property is relatively poor.This antenna is provided with two groups of " three words " shape reflectors in its active dipole back, the electric wave that TV station is come does not have the function of focusing, so the gain of this antenna is not high, this antenna has increased a high-gain amplifier for this reason, to improve its receiving sensitivity.But this Amplifier Gain is fixed again, and is relatively poor to the adaptability of reception environment like this, and the reception that causes forceful electric power being looked signal can cause jitterbug on the contrary, and it is not enough that light current is looked the signal receiving gain, so image is still smudgy.The problem that the CN92218140.3 antenna exists at the CN89215166 antenna, adopted the reflector that constitutes by 9 500mm long rule parabolically configuration, the electric wave that TV station is come has the function that focuses on to the feed oscillator, improved the gain of antenna, but the pick-up dipole of this antenna do not break away from yet the single oscillator of two-wire system circle.

Above-mentioned two kinds of antennas can only be done gyration by along continuous straight runs, can not do the luffing angle adjustment, can not adapt to particular surroundings, as the needs that use in built-up architecture bottom layer.

The purpose of this utility model is to provide a kind of high-gain, the compatible all-channel balcony of parabolic U, the V of wide band hemisphere formula to turn to television antenna.

The purpose of this utility model is to realize by following technical scheme: this scheme has been utilized the compatible mixing transformation device of the U in the prior art, V 28 variable gain amplifiers 25, antenna steering mechanism, antenna clip to be held in the clamping device 24 of balcony and control antenna along continuous straight runs and has been made control box 26 near 360 ° of gyrations.The major technique contribution of this antenna is to constitute uhf band hemisphere paraboloidal reflector 1 by 4-6 becket 3, wherein, the becket of outermost layer diameter maximum is again the pick-up dipole of VHF frequency range simultaneously, becket outside in, descending being in the respective aperture that is arranged on three arc stents 5 equably, the arc stent bottom is fixed on the movable bearing support 4.Two beckets 3 of outermost, the last interface 6 of its gap joins with the insulation of insulating material lining bar, and the lower interface 8 of its gap and the last lower interface of remaining becket gap then join with metal tube.

The focal axis plane of hemisphere paraboloidal reflector 1 is provided with a bracing member 9, and this bracing member is perpendicular to movable bearing support 4, and is fixed as one with this bearing, then disposes the antenna array 2 that is made of 3-6 active dipole on bracing member 9.

Movable bearing support 4 bottoms of this antenna are one with the swing arm 12 that can do the pitching adjustment.One long arc-shaped holes 31 is arranged at the bottom of swing arm, it is between the ears seat 14 that turns on the driving mechanism loam cake 13, grip with handle bolt 15, can do the luffing angle adjustment to antenna, to satisfy the needs that this antenna uses in built-up reception environment with this.

The utility model is compared the beneficial effect that is had with background technology and is:

1, this antenna uhf band feed adopts active dipole group, makes the reception antenna bandwidth of active dipole than single oscillator, and its gain is also high.

2, this antenna adopts rotation hemisphere paraboloidal reflector, and test shows, can more effectively improve the gain and the receiving sensitivity of antenna.

3, this antenna is provided with the movable bearing support that can adjust the antenna elevation angle degree turning to driving mechanism to cover, thereby makes this antenna can be abominable special at some.Received television signal in the environment.As: in built-up buildings, can effectively use equally.

4, this antenna steering mechanism, utilize the bidirectional characteristic of drive motors and the position-limit mechanism of configuration, make antenna can do the clockwise direction rotation, can do rotation counterclockwise again, and this antenna is in doing near 360 ° gyration, can prevent the winding of stube cable between mixing transformation device and the variable gain amplifier, overcome the unreliability that is electrically connected, thereby prolong the useful life of antenna.

Below by accompanying drawing embodiment of the present utility model is elaborated further:

Fig. 1, the compatible position controlled rotary antenna axle of hemisphere parabolic U, V are surveyed schematic diagram;

Fig. 2, steering mechanism's cross-sectional schematic;

The electrical schematic diagram of Fig. 3, antenna.

With reference to Fig. 1,2 and 3, the compatible all-channel of hemisphere parabolic U, V turns to television antenna, by hemisphere paraboloidal reflector 1, U, V mixing transformation device 28, variable gain amplifier 25, feed system, turn to driving mechanism, can make this antenna can make the adjusting mechanism of pitching adjustment, be held on the clamping device 24 of balcony and control this antenna along continuous straight runs and do to be constituted near the parts such as control box 26 of 360 ° of gyrations.

Hemisphere paraboloidal reflector 1 is that four beckets 3 that 8 millimeters metal tube curves are through in the respective aperture of three plastics arc stents 5 on the movable bearing support 4 that is fixed on the antenna aligning elevation gear and constitute by diameter.Four beckets are followed successively by 1680,1440,1230 and 1080mm from girth outside to inside, each becket is cut into two semicircular ring, after being through in the respective aperture of three plastics arc stents 5, two interfaces are up and down arranged respectively, last interface 6 usefulness insulating material lining bar maximum and second becket 7 insulation are joined, and the last lower interface of its lower interface 8 and all the other beckets all joins with metal liner.The focal axis plane of hemisphere paraboloidal reflector 1 is provided with a bracing member 9, and this bracing member is perpendicular to movable supporting seat 4, and is fixed as one with this supporting seat.The version that the five pairs of symmetrical dipoles 10 are pressed logarithm periodic antenna from outside to inside, be configured on the bracing member 9 from short to long in parallel to each other, the every pair of symmetrical dipole brachium is followed successively by 51,67,88,116 and 152mm, and the spacing of adjacent vibration generators is followed successively by 16,21,28 and 37mm from front to back.Movable bearing support 4 bottoms that arc stent 5 bottoms of hemisphere paraboloidal reflector 1 are fixed are one with the adjusting mechanism swing arm 12 that can do the pitching adjustment, one long arc-shaped holes 31 is arranged at the bottom of swing arm, this slotted hole is between the ears seat 14 that turns on the driving mechanism loam cake 13, and is fixed on the ears seat 14 with handle type bolt 15.The synchronous driving motor 18 that has bidirectional characteristic and dispose position-limit mechanism is housed on the motor bearing 17 in steering mechanism's steering base 16, through on its terminal output shaft of one group of deceleration device travelling gear 19 being housed, this gear is meshed with steering base 16 inboard gear rings 20, the loam cake 13 of steering base 16 is coupled by screw, as long as drive motors 18 rotates, gear 19 makes steering base 16 rotate simultaneously together with the antenna part on the loam cake 13 by gear ring 20 like this.Motor bearing 17 ends are expansion tube 21, and screw thread is arranged outward, and it is stretched out by steering base 16 lower ends.Support bar 22 upper ends are inserted in the expansion tube 21, tighten with nut 23 and fixed.Be connected with balcony clamping device 24 by support bar 22 lower ends, the clamping device lower end is circle perforate 25, the cable 27 of drawing from control box 26 links to each other with variable gain amplifier 25 in the clamping device 24, for it provides direct current, simultaneously to synchronous driving motor 18 conveying AC power.The variable gain amplifier 25 usefulness stube cables that are arranged in the balcony clamping device 24 link to each other with mixing transformation device 28 in being arranged on steering mechanism top.The uhf band input terminal 29 of this mixing transformation device links to each other with the cable of drawing from the shortest dipole of logarithm antenna dipole array 2 front ends, its VHF frequency range input terminal 30 links to each other with the stube cable that the last interface 6 of the becket 3 of hemisphere paraboloidal reflector 1 maximum is drawn, the loop aerial that a becket 3 by the maximum on the hemisphere paraboloidal reflector 1 constitutes, can receive VHF band TV signal from TV station, and, then can receive uhf band television signal from TV station by placing the logarithm antenna dipole array 2 on the hemisphere paraboloidal reflector 1 focal axis plane.And through mixing transformation device 28 and the stube cable by 25 of mixing transformation device and variable gain amplifiers to variable gain amplifier 25, last then export television receiver to through stube cable between itself and the control box and the TV signal output cable 32 on the control box by variable gain amplifier 25.A cable 31 of control box 26 connects power supply, press button 11 and can connect the drive motor power supply, travelling gear 19 on the output shaft of this motor is meshed with the gear ring 20 of steering base 16 inboards, steering base 16 just can rotate simultaneously together with set movable bearing support 4 on its lid 13 like this, thereby its top antenna part can be done in the horizontal direction near the scanning search gyration in 360 ° the scope, to seek and to aim at the TV station of required reception.When this antenna uses under particular surroundings, as using in the buildings bottom that stands in great numbers at top grade, then can loosen with handle bolt 15, antenna is done the luffing angle adjustment, to satisfy the needs that under above-mentioned particular surroundings, use antenna by the ears seat 14 on steering mechanism's loam cake 13.

Claims

1, the parabolic U of hemisphere, the compatible all-channel balcony of V formula turns to television antenna, this antenna comprises U, V mixing transformation device (28), variable gain amplifier (25), feed system, antenna steering mechanism, antenna clip is held in the fixture (24) of balcony and the control box (26) that control antenna rotates, it is characterized in that this antenna is made of the hemisphere paraboloidal reflector (1) of uhf band 4-6 becket (3), wherein the becket of outermost diameter maximum is again the pick-up dipole of VHF frequency range simultaneously, its becket (3) is outside in descending to be in the respective aperture that evenly is arranged on three arc stents (5), the arc stent bottom is fixed on the movable bearing support (4), two beckets (3) of outermost, the last interface (6) of its gap joins with the insulation of insulating material lining bar, and the last lower interface of the lower interface of its gap (8) and all the other becket gaps then joins with metal tube; The focal axis plane of hemisphere paraboloidal reflector (1) is provided with a bracing member (9), this bracing member fixes perpendicular to movable bearing support (4) and with this bearing and is one, is then disposing the antenna array (2) that is made of 3-6 active dipole on bracing member (9); Movable bearing support (4) bottom with can do the swing arm (12) that pitching adjusts and be one, a long arc-shaped holes (31) is arranged at the bottom of swing arm, it is between the ears seat (14) on steering mechanism's loam cake (13), grips with handle bolt (15).