CN2128781Y - All-channel cordwood system deformation antenna - Google Patents

Abstract

The utility model relates to an all-channel cordwood system deformation TV (active) antenna which comprises a novel antenna with three different receiving performances, namely orientation, multidirection and omnidirection. The all-channel cordwood system deformation antenna is used for oriented reception of medium and long distances and is used for omnidirectional and multi-channel reception of near distance; the all-channel cordwood system deformation antenna also is used for omnidirectional reception of vehicles, ships and other movable occasions. A plurality of full-wave annular vibrators are used for receiving UHF signals; the utility model has the advantages of high gain, broad frequency band and small standing-wave coefficient. When dipole vibrators with inductance are used, the size of the antenna can be reduced effectively to adapt for different occasions and layers demands.

Description

All-channel cordwood system deformation antenna

A kind of all-channel cordwood system type distortion (active) antenna is applicable to that television set makes reception antenna.

Along with television set is universal day by day, people also improve day by day to the requirement of tv programme source, not only wish to overcharge platform, and the image stabilization that hope receives, noiseless is disturbed, bright in luster, sound accompaniment is clear, in general the sensitivity of television set be certain, the signal quality height that this just requires antenna to receive, and big and medium-sized cities are one to solve the signal source approach of quality effectively promoting shared television system, but it is subjected to factor affecting such as up-front investment cost height, certain limitation is arranged, and Chinese countryside is that population and area all have comparative advantage, so the television receiving antenna of high performance-price ratio must be welcome, logarithm periodic antenna, position controlled rotary antenna, multi-faceted antenna emerge in multitude, wide band logarithm periodic antenna gain is higher, and its directivity is also strong, but unfavorable to multidirectional TV signal reception; Position controlled rotary antenna operation, use inconvenience; Multi-faceted antenna gain is not high, is not suitable for distance reception, and therefore limitation is all arranged.

The purpose of this utility model provides the needs of a kind of user according to the reception environment condition, can oneself arbitrarily be assemblied to form have orientation, the novel antenna of multi-faceted and comprehensive reception.

The purpose of this utility model is to realize like this, it comprises oscillator (1), insulation cassette holder (2), antenna beam (3) is (when it makes horizontal positioned, contain antenna fixed lever (4)), output radio frequency cable and radio frequency plug (5) or (5 '), when need increase the antenna output level, also can comprise antenna amplifier antennafire (6), electric source connecting box (7), antenna amplifier antennafire (6) is contained in the place near antenna, electric source connecting box (7) is placed near the television set, be connected with radio frequency cable between the three, it is characterized in that, antenna contains the all-wave ring type vibrator W1 that works in UHF, W2, Wa(a 〉=2), with the dipole element that works in VHF (can charged sense L) W1 ', W2 ', Wb ' (b 〉=2), it all is an active dipole, insulation cassette holder (2) partly is made up of pedestal box and rain cover two, oscillator is fixed on the pedestal box with Luo Ding, have the wiring mounted head in the box and supply impedance matching box, the space that blender is installed, the lead-out wire hole is positioned at pedestal box below, Rainproof case covers from the top, in case rain erosion, this pedestal box moves freely on the antenna beam and available Luo Ding is locked, installation order and the position of oscillator on the antenna beam can be done to arrange arbitrarily and combination, and it also can do front and back or left rotation and right rotation adjustment on the antenna beam.When the antenna beam is made horizontal positioned, all-wave ring type vibrator and dipole element are by the height sequence arrangement of operating frequency, and it just forms one pair of directional antenna; When the antenna beam is done vertical the placement, the all-wave ring type vibrator is made order or installation up and down with one heart, dipole element places its below to make level and installs, and makes the angle between per two all-wave ring type vibrators and per two dipole elements all be adjusted into 90 degree, and this just forms one pair of comprehensive antenna; The same antenna beam is done vertical the placement, makes each ring type vibrator and dipole element aim at the direction that desire receives TV station respectively, and when a oscillator aimed at a face, it just can receive the signal of 2a direction, and this just forms one pair of multi-faceted antenna.All-wave ring type vibrator W1, W2, Wa(a 〉=2) output is connected to impedance (balance/imbalance) adaptation Z1, Z2, Za(a 〉=2), its uneven output hot junction is connected with the input of blender Z3, W1 ', W2 ', the output of Wb ' (b 〉=2) is connected to impedance (balance/imbalance) adaptation Z1 ', Z2 ', Zb ' (b 〉=2), its uneven output hot junction is connected with the input of blender Z4, Z3, the output of Z4 is connected with the input of blender Z5 respectively, and the output of Z5 is connected with television set with radio frequency plug Xp by radio frequency cable; Another scheme of mixing back balance/imbalance conversion and impedance matching earlier is, two outputs of each oscillator also can directly be connected with blender two balance inputs separately, two balance outputs of blender are connected with impedance (balance/imbalance) adaptation input, and the uneven output of impedance matching box is connected with radio frequency plug.When need increase the antenna output level, can be respectively between two inputs of the output of Z3, Z4 and Z5, seal in broadband low noise amplifier circuit A1, A2, the output of Z5 is connected with C2, L1, L2 by C1, the other end of C2 is connected with the fixed contact of switch S, another fixed contact of S is connected with radio frequency socket Xs, the moving contact of S is connected with radio frequency plug Xp by radio frequency cable, and DC power supply G powers to A1, A2 by L1, L2.

The utility model is the needs of a kind of user according to the reception environment condition, can oneself arbitrarily be assemblied to form have orientation, the novel antenna of comprehensive and multi-faceted three kinds of different receptivities, it uses flexibly, both can be used for remote directional reception, can be used for the comprehensive receptions of mobile occasion such as car and boat again, can be used for many TV stations multichannel again and receive.Used the all-wave ring type vibrator to receive the UHF signal, gain is high, bandwidth, and standing-wave ratio is little, when using the dipole element of charged sense, can dwindle antenna size effectively, so that adapt to different occasions and leveled demand, when the band antenna amplifier antennafire, improved the antenna output level, be beneficial to receive remote small-signal, its electric source connecting box has external radio frequency socket and selector switch, for external video tape recorder and other signal sources provide convenience.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model antenna schematic diagram of two kinds of combinations in addition.

Fig. 3 is the electrical schematic diagram of two kinds of embodiment of the utility model.

Be described further below in conjunction with accompanying drawing.

The girth of all-wave ring type vibrator equals received signal wavelength X o, UHF can be divided into two working frequency range of height or a plurality of frequency range generally speaking, the girth of corresponding oscillator is got the centre wavelength of this frequency range, when using a plurality of oscillator, can make the girth of oscillator just equal to desire the wavelength of receiving channels, for example there are 15 channels, 36 channels and 48 channels in the somewhere, and as Fig. 1, the girth of its three ring type vibrators is got the wavelength of above-mentioned three channels respectively.The VHF frequency range is got the 1/4 λ o except that an arm oscillator length of dipole element, and other are with the UHF principle.

Shown in Figure 2 helps azimuth anteena by the oscillator permutation and combination, the angle that places the second ring oscillator of antenna beam top is 90 degree, it is to install with one heart, the girth of big oscillator is got low-frequency range centre wavelength, the girth of little oscillator is got high band centre wavelength, place middle two ring oscillators in addition of antenna beam and above-mentioned second ring oscillator size and installation method identical, just its angle fixing on the antenna beam is, big oscillator and big oscillator right angle each other in two groups of oscillators, the right angle each other of little oscillator and little oscillator, two dipole elements are equipped with in the below, it is installed on the insulation cassette holder at right angle each other, the length that each arm oscillator is inboard one section is got the wavelength of the channel in the wavelength of 1/49 channel or the III wave band (6～12 channel) that desire receives, this section oscillator outside is connected to inductance L, the outside of inductance L covers with insulant and fixes with oscillator, and the inductance L other end is connected with another section oscillator.

Shown in Figure 3 becomes multi-faceted antenna by the oscillator permutation and combination, and the all-wave ring type vibrator that size is little places the top, and in the middle of big all-wave ring type vibrator placed, two dipole elements placed the below by operating frequency height order, and the value of oscillator size is identical with above-mentioned principle.

Fig. 4 carries out the conversion of impedance and balance/imbalance earlier for the utility model, after carry out the band amplifying circuit of hybrid plan and not with two kinds of embodiment of amplifying circuit.After Z1 among the figure, Z2, Za can use 1/4 λ o stub to carry out the balance/imbalance conversion, use the direct parallelly feeding of radio frequency cable (effect is equivalent to Z3) of three section 1/4 λ o in addition again, certainly after Z1, Z2, Za also can use diplopore magnetic core converter to carry out impedance and balance/imbalance conversion, carrying out signal by the blender of being made up of lumped-parameter element (L, C) mixes, this lumped-parameter element blender commercialization is no longer described in detail here.The VHF channel is because wavelength is longer, can use diplopore magnetic core impedance matching box to carry out the conversion of impedance and balance/imbalance after, mix by blender.DC power supply can and constitute behind rectifying and wave-filtering with dry cell or alternating current 220V transformation, goes to connect～220V as the attaching plug of Fig. 1.

Claims (3)

1, a kind of all-channel cordwood system type distortion (active) antenna, it comprises oscillator (1), insulation cassette holder (2), antenna beam (3) is (when it makes horizontal positioned, contain antenna fixed lever (4), output radio frequency cable and radio frequency plug (5) or (5 '), when need increase the antenna output level, also can comprise antenna amplifier antennafire (6), electric source connecting box (7), antenna amplifier antennafire (6) is contained in the place near antenna, power supply connects box (7) and is placed near the television set, be connected with radio frequency cable between the three, it is characterized in that, antenna contains the all-wave ring type vibrator W1 that works in UHF, W2, Wa (a 〉=2), with the dipole element that works in VHF (can charged sense L) W1 ', W2 ', Wb ', (b 〉=2), it all is an active dipole, insulation cassette holder (2) partly is made of pedestal box and rain cover two, oscillator is fixed on the pedestal box with Luo Ding, have the wiring mounted head in the box and supply impedance matching box, the space that blender is installed, the lead-out wire hole is positioned at pedestal box below, rain cover covers from the top, in case rain erosion, this pedestal box can move freely on the antenna beam and available Luo Ding is locked, oscillator can be done front and back or left rotation and right rotation adjustment on the antenna beam, when the antenna beam is made horizontal positioned, UFH all-wave ring type vibrator and dipole element oscillator are by the height sequence arrangement of operating frequency, and it just forms one pair of directional antenna; When the antenna beam is done vertical the placement, the all-wave ring type vibrator is made order or installation up and down with one heart, dipole element places its below to make level and installs, and makes the angle between per two all-wave ring type vibrators and per two dipole elements all be adjusted into 90 degree, and this just forms one pair of comprehensive antenna; The same antenna beam is done vertical the placement, makes each ring type vibrator and dipole element aim at the direction that desire receives TV station respectively, and when a oscillator aimed at a face, it just can receive the signal of 2a direction, and this just forms one pair of multi-faceted antenna.

2, device according to claim 1, levy at that time and be, all-wave ring type vibrator W1, W2, Wa(a 〉=2) output is connected to impedance (balance/imbalance) adaptation Z1, Z2, Za(a 〉=2), its uneven output hot junction is connected with the input of blender Z3, dipole element W1 ', W2 ', the output of Wb ' (b 〉=2) is connected to impedance (balance/imbalance) adaptation Z1 ', Z2 ', Zb ' (b 〉=2), its uneven output hot junction is connected with the input of blender Z4, Z3, the output of Z4 is connected with the input of blender Z5 respectively, and the output of Z5 is connected with television set with radio frequency plug Xp by radio frequency cable; Another scheme of mixing back balance/imbalance conversion and impedance matching earlier is, two outputs of each oscillator can directly be connected with blender two balance inputs separately, two balance outputs of blender are connected with impedance (balance/imbalance) adaptation input, and the uneven output of impedance matching box is connected with radio frequency plug.

3, device according to claim 1, its feature also is, when need increase the antenna output level, can be respectively between two inputs of the output of Z3, Z4 and Z5, seal in broadband low noise amplifier circuit A1, A2, the output of Z5 is connected with C2, L1, L2 by C1, the other end of C2 is connected with the fixed contact of switch S, another fixed contact of S is connected with radio frequency socket XS, the moving contact of S is connected with radio frequency plug Xp ' by radio frequency cable, and DC power supply G powers to A1, A2 by L1, L2.

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