CN2263406Y

CN2263406Y - All channel receiving antenna for TV set

Info

Publication number: CN2263406Y
Application number: CN 96216029
Authority: CN
Inventors: 张伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-02
Filing date: 1996-08-02
Publication date: 1997-09-24
Anticipated expiration: 2006-08-02

Abstract

The utility model belongs to the receiving device of the television signal, and the utility model relates to an all channel receiving antenna for a TV. The antenna comprises a basic half wave vibrator assembled on a supporting bar, planar folding vibrators, an annular receiving antenna of a U channel and a corresponding amplifier. In particular, the annular receiving antenna of the U channel is formed by three folding vibrators bent into arc shapes, and the three folding vibrators are surrounded into a circular ring of definite diameter. Each circuit unit in the amplifier also greatly improve impedance matching and the induction amount of the television signal. Therefore, the utility model has the advantages of simple structure, easy assembly, high gain, quite wide application region, etc.

Description

A kind of full channel tv receiving antenna

The utility model belongs to the receiving system of television signal, is a kind of full channel tv receiving antenna.

At present along with each channel program quantity of TV station's emission is on the increase, original television receiving antenna can not satisfy people (particularly numerous rural subscribers') rating requirement, in order to improve this present situation, develop all channel antenna of a kind of " 001 " type, loop aerial and four short leads that the comprehensive oscillator of U channel of this antenna is made up of the half-wave dipole of six 1/6 circular arcs are assembled, but the television receiving antenna of this class formation still exists complex structure, impedance does not match and induced signal a little less than, the station synchronization that can watch is insufficient wait not enough.

The purpose of this utility model is to provide a kind of full channel tv receiving antenna.This antenna comprises the basic half-wave dipole that is assemblied in successively on the support bar, plane folded dipole, U channel loop receiving antenna, and corresponding amplifier.U channel loop receiving antenna particularly, it mainly bends to the annulus that 100 °-110 ° circular-arc folded dipole surrounds certain diameter by three.And each circuit unit in the amplifier has also increased substantially the induction amount of impedance matching and TV signal, so the utility model can overcome the existing in prior technology deficiency effectively.

Overall structure of the present utility model is:

A kind of full channel tv receiving antenna, by at least one single armed dipole antenna (1), folded dipole antenna (2), the loop aerial (3) that at least three circular-arc oscillators surround assembles, and dispose corresponding amplifier (4), three groups of element antennas and amplifier box body are installed on the vertical support bar (5) from top to bottom successively, the loop aerial (3) that is positioned at supporting bar top is by three shapes, measure-alike circular-arc folded dipole (6) is mutually uniformly-spaced around forming, spacing each other is 20-22mm, the loop aerial diameter that is surrounded is 200-300mm, it is φ 6-10mm that each circular-arc folded dipole is selected caliber for use, total length is not less than the aluminum pipe of 500mm, the plane folded dipole width d that it is corresponding ₁Be not less than 25mm.Length l ₁Be 200-240mm, the end is an arc, the gap h of each end (7) is not less than 10mm, along amounting to plain bending plane folded dipole is 100 °-110 ° arc, be circular-arc folded dipole, has a plate (8) by three circular antenna oscillator centers that circular-arc folded dipole surrounded, three supporting brackets of first-class fixed interval (9) on the plane of connecting plate, three supporting bracket other ends overlap (10) with each insulation grafting of three ports respectively and are fastenedly connected, put the binding post (11) that each end of installation and oscillator links to each other in each insulation grafting, the lead-in wire of each binding post (12) is coupled to each other two signal input lines of formation (13) by per three lines of determining of rule and is connected with the amplifier circuit input through adaption converter (14); The fastening attaching of connecting plate bottom surface and supporting bar top; Assemble at least one plane folded dipole (2) at the support bar place that is not less than 20mm apart with loop aerial, assembling is the insulation plugboard or the conventional clip that can be connected with support bar, two ends of each folded dipole respectively with member (15), the length l after each plane folded dipole is amounted to ₂Be 670-1620mm, width d2 is 65-75mm, adopting caliber is the aluminum pipe of 6-10mm, disposes 300 Ω/75 Ω impedance matching boxs (17) in addition at the plugboard place, and each terminals of adaptation are connected between two lead-in wires and amplifier input terminal of folded dipole end, plane; Assembling at least one single armed half-wave dipole (1) with the plane folded dipole at a distance of the support bar place at 15-20mm place, the junction is positioned at this oscillator middle part, and need 1: 1 colour TV impedance matching transducer (19) of configuration, and the single armed half-wave dipole is that length is 135-90mm, caliber is the aluminum pipe of φ 6-10mm; Near the single armed half-wave dipole fixing box body of amplifier (4) on the support bar at 10mm place at least, or be positioned over box body indoor separately, circuit in the amplifier box body is by power circuit unit (20), coupling filter circuit unit (21), amplifier circuit unit (22) and rectifying output circuit unit (23) are interconnected to constitute, and each is installed on box body imports, output plughole and photoelectric display device, wherein, power circuit unit (20) is to serve as the main resistance that has with transformer BZ, capacitor and inductor L, the ac-dc switching power of rectification filtering circuit, in this circuit unit, resistance R ₇, R ₈, capacitor C ₂₁Be connected in series two television set sockets (24), a video tape recorder socket (25) in each branch road of shunt circuit respectively, and the output terminals A that its output socket (26) is gone back connecting circuit unit (23), circuit unit (21) is three the compound high pass L, C filter circuit of 47MHz, 230MHz, 450MHz by cut-off frequency respectively and is that two compound low pass L, the C filter circuit of 95MHz, 165MHz is that principal phase connects and constitutes by cut-off frequency, the lead end of 1-4 channel, 5-12 channel, U channel antenna by socket (27), (28), (29) respectively with circuit in capacitor C ₁, the inductance winding L ₄, capacitor C ₁₀Connect the inductance winding L ₉, L ₁0 and capacitor C ₁₂Interconnect the inductance winding L ₉, L ₁₀With capacitor C ₁₂Interconnect the coupling circuit that the loop that forms is connected with circuit unit (22) for this circuit unit, circuit unit (22) amplifies piece W and inductance winding L by microwave amplifier tube or microwave ₁₁, L ₁₂, resistance R ₂, R ₃, diode D ₁Interconnect and form the capacitor C in its output connecting circuit unit (23) ₁₅, circuit unit (23) is by the diode D that is in parallel ₃, capacitor C ₁₈, filtering capacitor C ₁₅, C ₁₆, C ₁₇, C ₁₈Joining rectification filtering circuit and resistance R ₄, light-emitting diode D ₂The power indicating circuit of series connection is by the inductance winding L ₁₄Be coupled to each other formation, the socket in each circuit unit (24), (25), (26), (27), (28), (29) and light-emitting diode D ₂, D ₄Be installed in respectively on each panel (30) of amplifier box body.

Other architectural features also have:

Each terminals of three circular-arc oscillators are pressed a, c, b, e, after d, f rule link, connect with 300 Ω/75 Ω colour TV impedance matching box terminals on being assemblied in socket (29) by 300 Ω flat TV feeders, power circuit unit (20) can be arranged separately in the box body.

The components and parts of forming three compound high pass filter loops are respectively: capacitor C ₁, C ₂, C ₃, the inductance winding L ₁, capacitor C ₇, C ₉, the inductance winding L ₆, L ₇And capacitor C ₁₀, C ₁₁, the inductance winding L ₉The components and parts of forming two composite low-pass filter loops are respectively: capacitor C ₄, the inductance winding L ₂, L ₃, capacitor C ₅, C ₆, the inductance winding L ₄, L ₅

Accompanying drawing of the present utility model has:

Fig. 1 is the overall structure sketch of full channel tv receiving antenna.

Fig. 2 is the amplifier circuit schematic diagram.

Accompanying drawing has provided embodiment of the present utility model, further specifies as follows in conjunction with the accompanying drawings:

One, each channel receives principle

1, the reception of 1-4 channel TV signal: because the performance of resonance depends on the length of this oscillator and the caliber of aluminum pipe, then in order to satisfy the requirement of 1-4 channel signals, get the long 900mm of being of single armed, φ 8mm aluminum pipe, be 75 Ω because of its output impedance in addition, so need to install 1: 1 colour TV adaption converter, the feeder line of transmission signals and the jack (27) on the amplifier box body surface pegged graft.

2,5-12 channel folded dipole is to the reception of TV signal: in order to guarantee its bandwidth, so amount to the back length L ₂Be 750mm, D ₂Width is 75mm, also need connect the 300 Ω/75 Ω adaption converters of colour TV in addition, and conversion back signal transmission feeder could be pegged graft with the jack (28) on the amplifier panel.

3, U channel loop aerial is to the reception of TV signal: the length that (1) respectively responds to oscillator has increased nearly one times, make its induction amount increase nearly one times than existing comprehensive oscillator of the same type, satisfied the requirement of amplifier preferably, so the TV programme quantity and the picture quality of watching are greatly improved.(2) in order to prevent that the place means of chaotic signals is coupled to the spike pulse damage W element that amplifying circuit produces through antenna, adds crystal diode D at the II plate ₁, D under the normal condition ₁End, and D when above-mentioned pulse occurring ₁The trouble free service of W element has been protected in conducting.

Two, amplifier operation principle

1, receives for the all-channel that satisfies this television receiving antenna, and avoid noise jamming influence reception to each channel signals, its coupling filter circuit has designed three compound high pass filters and two composite low-pass, has improved the receptivity to each channel signals greatly.Each filter is formed as described above.

2, (1) serves as main and each biasing resistor R with microwave amplifier tube W ₂, R ₃, the inductance winding L ₁₁, L ₁₂Biasing circuit constitute amplifying circuit, be the broadband hybrid amplifying circuit, and the TV signal after amplifying by the output of III plate, the resistance R of this circuit ₃Also be negative feedback resistor, can guarantee that self-excitation does not take place circuit, and reduce cost.For adapting to the requirement of different regions to this amplifier gain, W (AT ₄₁₅Pipe) also can select for use microwave to amplify piece (A ₀₈).(2) be coupled to the spike pulse damage W element that the non-TV signal of amplifying circuit produces for preventing through antenna, add crystal diode D at W element II plate ₁Can release enters the pulse current of circuit, protection W operate as normal.(3) rectification and output circuit unit mainly are through D ₃Rectification, capacitor C ₁₅, C ₁₆, C ₁₇, C ₁₈Filtering, resistance R ₁, R ₂, R ₃For amplifying circuit provides operating voltage.Particularly the amplifying signal of signal output apparatus output is through capacitor C ₁₃, C ₁₄, inductance winding L 13 is coupled to A point output, and with this point also as the input point that connects with power circuit, add cartridge socket A and simplified circuit structure.(4) R ₅, D ₄The power indicating circuit of forming power pack, capacitor C ₁₉Be to prevent that same AC power cord from having the influence of other appliance switches to this circuit.Prevented from effectively simultaneously to cause the amplifier amplifying power to descend because voltage reduces: when promptly voltage changed between 180V-240V, the voltage of the transformer other end was 12.3V-16.4V, after the rectification step-down, and capacitor C ₁₅The voltage of end still has the ability to make the amplifier operate as normal.(5) signal after the amplification is transferred to the B point through L by the output of A point ₁₅, C ₂₀, R ₆Be divided into three the tunnel, wherein two-way is respectively through R ₇, R ₈, supplying two television set TV receptions simultaneously respectively, and be independent of each other, Third Road is through C ₂₁Use for video tape recorder.Here C ₂₀Has the isolation AC power, the effect of coupling amplified television signal.

The obtained technological progress of the utility model is:

1, the U channel adopts loop aerial, and the induction amount improves greatly, makes TV reception number of units and figure picture element Amount has had great improvement.

2, because whole antenna device arrangement is simple, the impedance mismatch that can prevent assembly defect and avoid causing. Adopt ripe broadband Hybrid amplifier circuit, amplifying device adopts microwave amplifier spare W, makes the gain amplifier height, Noise is obviously decayed, stable performance, and prevented the mutual interference of each frequency range and strong signal self-excitation.

3, the power supply that adopts, making amplifying circuit is to change between the 180V-240V at line voltage The time, can both be operated in linear magnifying state. Amplifying circuit in the power pack can provide electricity to two television sets simultaneously Depending on signal, and be independent of each other, and can use simultaneously one of video recorder.

So the utlity model has simple in structurely, be easy to assembling and amplifier gain height, each channel that receives is believed Number all can satisfy the rating requirement, adapt to the characteristics such as the region is wider.

Claims

1, a kind of full channel tv receiving antenna, by at least one single armed dipole antenna (1), folded dipole antenna (2), the loop aerial (3) that at least three circular-arc oscillators surround assembles, and dispose corresponding amplifier (4), it is characterized in that three groups of element antennas and amplifier box body are installed on the vertical support bar (5) successively from top to bottom, the loop aerial (3) that is positioned at supporting bar top is by three shapes, measure-alike circular-arc folded dipole (6) is mutually uniformly-spaced around forming, spacing each other is 20-22mm, the loop aerial diameter that is surrounded is 200-300mm, it is φ 6-10mm that each circular-arc folded dipole is selected caliber for use, total length is not less than the aluminum pipe of 500mm, the plane folded dipole width d that it is corresponding ₁Be not less than 25mm.Length l 1 is 200-240mm, the end is an arc, the gap h of each end (7) is not less than 10mm, along amounting to plain bending plane folded dipole is 100 °-110 ° arc, be circular-arc folded dipole, has a plate (8) by three circular antenna oscillator centers that circular-arc folded dipole surrounded, (9) three supporting bracket other ends of three supporting brackets of first-class fixed interval are fastenedly connected with each insulation of three ports cover (10) of pegging graft respectively on the plane of connecting plate, put the binding post (11) that each end of installation and oscillator links to each other in each insulation grafting, the lead-in wire of each binding post (12) is coupled to each other two signal input lines of formation (13) by per three lines of determining of rule and is connected with the amplifier circuit input through adaption converter (14); The fastening attaching of connecting plate bottom surface and supporting bar top; Assemble at least one demifacet folded dipole (2) at the support bar place that is not less than 20mm apart with loop aerial, assembling is the insulation plugboard or the conventional clip that can be connected with support bar, two ends of each folded dipole respectively with member (15), the length l after each plane folded dipole is amounted to ₂Be 670-1620mm, width d ₂Be 65-75mm, adopting caliber is the aluminum pipe of 6-10mm, disposes 300 Ω/75 Ω impedance matching boxs (17) in addition at the plugboard place, and each terminals of adaptation are connected between two lead-in wires and amplifier input terminal of folded dipole end, plane; Assembling at least one single armed half-wave dipole (1) with the plane folded dipole at a distance of the support bar place at 15-20mm place, the junction is positioned at this oscillator middle part, and need 1: 1 colour TV impedance matching transducer (19) of configuration, and the single armed half-wave dipole is that length is 135-90mm, caliber is the aluminum pipe of φ 6-10mm; Near the single armed half-wave dipole fixing box body of amplifier (4) on the support bar at 10mm place at least, or be positioned over box body indoor separately, circuit in the amplifier box body is by power circuit unit (20), coupling filter circuit unit (21), amplifier circuit unit (22) and rectifying output circuit unit (23) are interconnected to constitute, and each is installed on box body imports, output plughole and photoelectric display device, wherein, power circuit unit (20) is to serve as the main resistance that has with transformer BZ, capacitor and inductor L, the ac-dc switching power of rectification filtering circuit, in this circuit unit, resistance R ₇, R ₈, capacitor C ₂₁Be connected in series two television set sockets (24), a video tape recorder socket (25) in each branch road of shunt circuit respectively, and the output terminals A that its output socket (26) is gone back connecting circuit unit (23), circuit unit (21) is three the compound high pass L, C filter circuit of 47MHz, 230MHz, 450MHz by cut-off frequency respectively and is that two compound low pass L, the C filter circuit of 95MHz, 165MHz is that principal phase connects and constitutes by cut-off frequency, the lead end of 1-4 channel, 5-12 channel, U channel antenna by socket (27), (28), (29) respectively with circuit in capacitor C ₁, the inductance winding L ₄, capacitor C ₁₀Connect the inductance winding L ₉, L ₁₀With capacitor C ₁₂Interconnect the inductance winding L ₉, L ₁₀With capacitor C ₁₂Interconnect the coupling circuit that the loop that forms is connected with circuit unit (22) for this circuit unit, circuit unit (22) amplifies piece W and inductance winding L by microwave amplifier tube or microwave ₁₁, L ₁₂, resistance R 2, R ₃, diode D ₁Interconnect and form the capacitor C in its output connecting circuit unit (23) ₁₃, circuit unit (23) is by the diode D that is in parallel ₃, capacitor C ₁₈, filtering capacitor C ₁₅, C ₁₆, C ₁₇, C ₁₈Joining rectification filtering circuit and resistance R ₄, light-emitting diode D ₂The power indicating circuit of series connection is by the inductance winding L ₁₄Be coupled to each other formation, the socket in each circuit unit (24), (25), (26), (27), (28), (29) and light-emitting diode D ₂, D ₄Be installed in respectively on each panel (30) of amplifier box body.

2, television receiving antenna according to claim 1, each terminals that it is characterized in that three circular-arc oscillators are by a, c, b, e, after d, f rule link, connect with 300 Ω/75 Ω colour TV impedance matching box terminals on being assemblied in socket (29) by 300 Ω flat TV feeders, power circuit unit (20) can be arranged separately in the box body.

3, television receiving antenna according to claim 1 and 2 is characterized in that the components and parts of forming three compound high pass filter loops are respectively: capacitor C ₁, C ₂, C ₃, the inductance winding L ₁, capacitor C ₇, C ₉, the inductance winding L ₆, L ₇And capacitor C ₁₀, C ₁₁, the inductance winding L ₉The components and parts of forming two composite low-pass filter loops are respectively: capacitor C ₄, the inductance winding L ₂, L ₃, capacitor C ₅, C ₆, the inductance winding L ₄, L ₅