CN2098093U - Two-direction folding fan all-frequency channel antenna for tv - Google Patents

Abstract

The utility model relates to an outdoor antenna used for receiving 1-57 all-channel TV signals. The UHF frequency band antenna of the outdoor antenna comprises a folding fan-shaped active dipole, six director, a reflector and a cross rod which are made according to the central wavelength of 13-57 frequency bands. The VHF frequency band antenna of the outdoor antenna comprises a folding fan-shaped active dipole, a director, a reflector and a cross rod which are made according to the central wavelength of 1-12 frequency bands. The two cross rods are connected and fixed by the connection joint of a metal clip; the TV signals of the two frequency bands are transmitted to the TV receiver only with one feed line by a UHF-VHF signal mixer. The outdoor antenna which makes TV images clear can receive a plurality of TV programs; the utility model overcomes the defect of ghost.

Description

Two-direction folding fan all-frequency channel antenna for TV

The utility model relates to a kind ofly amounts to fan-shaped vibrator two direction TV all-channels the outdoor antenna assembly of guiding into.

Along with the development of radio and television services, TV station starts broadcasting successively and sets up new broadcasting channel, and various places are also set up many television relay stations in succession.Watch multi-channel programme, must use the broadband reception antenna.Though and general hollow fan anteena than * shape antenna reception is good, the input impedance of fan anteena is 200 Europe, the impedance matching more complicated.Even fan-shaped active dipole can not be made the cross bar at center of metal tube, use insulating material, otherwise the thickness of metal cross bar will influence the input impedance of antenna significantly.

In addition, because the TV signal of VHF and uhf band often from different directions, therefore, exchanges or direct current machine although the antenna that has installs additional to use, holding in the palm two very long remote control leads, rotate the direction that changes antenna by motor, yet this is not only pretty troublesome, and expense is increased, the frequent rotation of motor makes the gear wear of motor very fast, reduces useful life, usually damages easily.Main is that antenna is gyrated in the TV signal that receives a direction, it's a pity and lost TV signal immediately from another direction, after the remote control steer motor stops operating, antenna always points to single direction, and the TV programme from another direction is watched in influence.

The purpose of this utility model is that a kind of input impedance height will be provided, and what frequency bandwidth was wide especially amounts to fan-shaped two direction TV all-channels outdoor receiving antenna device, and its input impedance is 300 Europe, is easy to realize that the characteristic impedance with feeder line is complementary; It both can be for making directional reception from the TV signal of same direction VHF frequency range and uhf band, again can be simultaneously for accomplishing directional reception well respectively from the TV signal of two different directions VHF frequency ranges and uhf band, the TV image definition is increased, help overcoming ghost image.

The purpose of this utility model is achieved in that to improving the input impedance of this reception antenna, designed and produced a kind of fan-shaped active dipole of amounting to, its do * end of the metal tube of shape oscillator four arms bends to the shape of amounting to, two arms of each side are the V-arrangement of amounting to, an end of not amounting to links to each other, an end of being amounted to opens, and the distance of opening two-end-point is half brachium.Respectively boring a hole near the open end points of V-arrangement two arms, respectively bore a hole respectively at its two ends with two metal tubes that are half brachium again, four screws are penetrated in these four holes, two metal tubes are penetrated two respectively with the screw in its two stomidium to be amounted to V-arrangement two arm rests and closely opens in the hole of end points, fastening nut, fixedly connected, just be made into the amount to fan-shaped active dipole of a kind of input impedance at the hollow triangular shape in 300 Europe.Amounting to fan-shaped two direction TV all channel antennas is made up of two parts: a part is the uhf band antenna, and it comprises that of making by the centre wavelength of uhf band 13-57 channel amounts to fan-shaped active dipole, six directors, a reflector and the cross bar that these oscillators of fixed installation are used; Second portion is the VHF band antenna, and it comprises that of making by the centre wavelength of VHF frequency range amounts to fan-shaped active dipole, a director, a reflector, a cross bar that is used for installing and fixing these oscillators.Two cross bars are fixedly connected being integral of metal clip by two screws of two ends band, metal clip is the connection joint component of two cross bars, and it is installed on the cross bar position of uhf band reflector back one end and on the cross bar position of VHF frequency range director front one end.When VHF and uhf band television signal during from same direction, metal clip connection joint can be connected and fixed the cross bar of two band antennas in line, and direction receives, when the TV signal of UHF and VHF frequency range is during from different directions, can earlier VHF band antenna director be pointed to VHF TV signal direction, then, by unscrewing the nut that metal clip connects strap wrenches on the joint, just can make the uhf band antenna is axle with the screw that metal clip connection joint is connected with the cross bar of uhf band antenna, rotation is regulated arbitrarily in 180 ° of scopes, after direction is regulated accurately, tighten the nut of strap wrenches, just can be fixed up the uhf band antenna direction, make VHF and uhf band antenna make directional reception respectively at two different directions simultaneously.The TV signal that VHF and UHF two band antennas receive is by behind a VHF and the UHF signal mixer, only just is transferred to television receiver easily with a feeder line.

The utility model has improved the input impedance of antenna itself because making to have used amounts to fan-shaped active dipole, makes its input impedance be easy to realize that the characteristic impedance with feeder line is complementary; Be connected the joint owing on the cross bar position of the cross bar of uhf band reflector back one end and VHF frequency range director front one end, installing and fixing metal clip, so the antenna of two frequency ranges both can be done directed consistent reception with the uhf band television signal for the VHF from same direction, again can be simultaneously for the directional reception of making different directions from two different directions VHF and uhf band television signal respectively, overcome ghost phenomena very successfully.Because two band antennas use a feeder line transmission by UHF and VHF signal mixer, therefore, the reception antenna of two different frequency ranges are isolated mutually, do not disturb mutually; Particularly amount to fan-shaped vibrator and be equivalent to strengthen the active dipole material diameter, passband is broadened, thereby wideer frequency bandwidth and have better frequency characteristic is arranged than general element antenna, improve the definition of television image significantly and increased the television channel of suitable reception.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is according to the fan-shaped two direction TV all channel antenna schematic representation of apparatus of amounting to that the utility model proposes.

Fig. 2 amounts to fan-shaped two direction TV all channel antenna devices simultaneously to making the schematic diagram that different directions receives from the VHF of two different directions and the TV signal of UHF channel according to what the utility model proposes.

Fig. 3 amounts to amounting to of fan-shaped two direction TV all channel antenna devices fan-shaped active dipole shape and structure schematic diagram according to what the utility model proposes.

Describe details and working condition in detail below in conjunction with Fig. 1, Fig. 2, Fig. 3 according to the concrete device that the utility model proposes.

This device uhf band antenna comprises six directors (1), there is one to amount to fan-shaped active dipole (2) in six directors (1) back, a reflector (3) is arranged in its back, director (1), the length dimension of amounting to fan-shaped active dipole (2) and reflector (3) are that the centre wavelength according to uhf band 13-57 channel designs and produces, and fixed distance is installed on the cross bar (4) at regular intervals; This device VHF band antenna has a director (7), there is one to amount to fan-shaped active dipole (8) in director (7) back, a reflector (9) is arranged in its back, director (7), the length dimension of amounting to fan-shaped active dipole (8), reflector (9) are that the centre wavelength according to VHF frequency range 1-12 channel designs and produces, and distance is fixed on the cross bar (4) at regular intervals; This device VHF band antenna has a director (7), there is one to amount to fan-shaped active dipole (8) in director (7) back, a reflector (9) is arranged in its back, director (7), the length dimension of amounting to fan-shaped active dipole (8), reflector (9) are that the centre wavelength according to VHF frequency range 1-12 channel designs and produces, and distance is fixed on the cross bar (10) at regular intervals.Because of this antenna feed impedance height, metal material can be used in cross bar (4), (10), and antenna feed impedance is not had influence, also can use insulating material certainly.Cross bar (4) and (10) are to be connected joint (5) by the metal clip that two ends have a screw to be connected and fixed.Metal clip connects on the cross bar position that joint (5) is installed in reflector (3) back one end and on the cross bar position of director (7) front one end.Metal clip connects the nut (6) of a screw with strap wrenches on the joint (5), can regulate degree of tightness easily.When the TV signal of VHF and uhf band during from same direction, metal clip connects joint (5) and can be connected and fixed the cross bar of two band antennas in line, carries out directed consistent reception, as shown in Figure 1.When the TV signal of VHF and uhf band during from two different directions, can be earlier the director of VHF band antenna be pointed to VHF television channel direction, and this direction fixed, then, connect the nut (6) that strap wrenches is gone up in joint (5) by unscrewing metal clip, can make the uhf band antenna is axle with the screw that metal clip connects the strap wrenches nut (6) that joint (5) is connected with cross bar (4), receive direction is regulated in rotation arbitrarily in 180 ° of scopes, after receive direction is regulated accurately, tighten the nut of strap wrenches, just can be fixed up the direction of uhf band antenna, the antenna of VHF and uhf band just can carry out directional reception respectively at two different directions, as shown in Figure 2.On metal clip connection joint (5) an additional metallic plate with many location holes is arranged, (not drawing among the figure) plays firm orientation.This device only sets up with a montant (11).

Only pass to television receiver with a feeder line from the TV signal of VHF and uhf band through a VHF and UHF signal mixer (not drawing among the figure), signal mixer is installed in fixing the plastics Rainproof case of UHF active dipole (8) distributing point.

Each oscillator all available 1 of this receiving system or the metal tube processing and fabricating of 2 cm diameters, active dipole (2) and (8) all can be by (a) among Fig. 3 or the shape and structure (b) make, active dipole (2) and (8) are that the open end of metal tube of doing X-shaped oscillator four arms is all bent to the shape of amounting to, two arms of each side are the v-shaped structure of amounting to, an end of not amounting to is linked to each other the back as distributing point, an end of being amounted to opens, and the distance of opening two-end-point is half brachium.Respectively boring a hole near the open two-end-point of two arms place, respectively bore a hole respectively at its two ends with two metal tubes that are half brachium again, four screws are penetrated in the hole, two metal tubes are penetrated two V-arrangement two arm rests respectively with the screw in its two stomidium closely to be opened in the hole of end points, fastening nut, fixedly connected, just be made into a kind of input impedance and be 300 Europe hollow triangular shape amount to fan-shaped active dipole, aa ' is the distributing point of active dipole among Fig. 3, and distributing point is fixed in the plastics Rainproof case with screw.

Claims (4)

1, amounts to fan-shaped two direction TV all channel antenna devices, antenna by VHF and two frequency ranges of UHF is formed, this device uhf band antenna comprises six directors (1), there is one to amount to fan-shaped active dipole (2) in six directors (1) back, a reflector (3) is arranged in its back, director (1), the length dimension of amounting to fan-shaped active dipole (2) and reflector (3) are that the centre wavelength according to uhf band 13-57 channel designs and produces, and distance is fixedly mounted on the cross bar (4) respectively at regular intervals; This device VHF band antenna has a director (7), there is one to amount to fan-shaped active dipole (8) in director (7) back, a reflector (9) is arranged in its back, director (7), amount to fan-shaped active dipole (8), the length dimension of reflector (9) is that the centre wavelength according to uhf band 1-12 channel designs and produces, and be fixed on the cross bar (10) apart from being mounted respectively at regular intervals, connecting joint (5) by a metal clip between cross bar (4) and the cross bar (10) is connected and fixed, metal clip connects on the cross bar position that joint (5) is installed in the cross bar position of reflector (3) back one end and director (7) front one end, it is characterized in that amounting to fan-shaped active dipole (2) and (8), be that the open end of metal tube of doing X-shaped oscillator four arms is all bent to the shape of amounting to, two arms of each side are the v-shaped structure of amounting to, an end of not amounting to is linked to each other the back as distributing point, an end of being amounted to is opened, the distance of opening two-end-point is half brachium, respectively boring a hole near the open end points of two arms, respectively bore a hole respectively at its two ends with two metal tubes that are half brachium again, four screws are penetrated in the hole, two metal tubes are penetrated two V-arrangement two arm rests respectively with the screw in its two stomidium closely to be opened in the hole of end points, fastening nut, be fixedly connected into a kind of active dipole of amounting to sector structure, its input impedance is 300 Europe.

2, device according to claim 1, it is characterized in that amounting to the structure of fan-shaped active dipole (2) and (8), be that the open end of metal tube of doing X-shaped oscillator four arms is all bent to the shape of amounting to, two arms of each side are the V-arrangement of amounting to, an end of not amounting to is linked to each other the back as distributing point, an end of being amounted to is opened, the distance of opening two-end-point is half brachium, respectively boring a hole near the open end points of two arms, the metal tube that is half brachium with two length respectively bores a hole respectively at its two ends again, four screws are penetrated in the hole, two metal tubes are penetrated two V-arrangement two arm rests respectively with the screw in its two stomidium closely to be opened in the hole of end points, fastening nut, the fixedly connected active dipole of amounting to sector structure that becomes, its input impedance is 300 Europe.

3, device according to claim 1, it is characterized in that between cross bar (4) and the cross bar (10) that connecting joint (5) by a metal clip is connected and fixed, metal clip connects on the cross bar position that joint (5) is installed in the cross bar position of reflector (3) back one end and director (7) front one end.

4, device according to claim 1, the TV signal that it is characterized in that VHF frequency range and uhf band through a VHF and UHF signal mixer after, only be transferred to television receiver with a feeder line, VHF and UHF signal mixer are installed in fixing the plastics Rainproof case of active dipole (8) distributing point.

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