CN2648727Y

CN2648727Y - Long-distance omnidirectional all-channel television receiving antenna

Info

Publication number: CN2648727Y
Application number: CNU032379641U
Authority: CN
Inventors: 李建刚; 李俊; 李洋; 李伦
Original assignee: 李建刚
Priority date: 2003-09-12
Filing date: 2003-09-12
Publication date: 2004-10-13
Anticipated expiration: 2013-09-12

Abstract

A remote omnidirectional full-channel television receiving antenna comprises four right angle active dipole arms that are formed by symmetrically crossing and combining in the horizontal plane. The feed point of the utility model is serially and electrically connected with an impedance matcher, a 75 ohm coaxial cable and a cable plug. The utility model can be used for receiving remote and omnidirectional VHF-UHF full-channel television program signal around about 300 Li without turning the receiving direction of the antenna.

Description

Long-range omnidirectional full channel tv receiving antenna

The utility model relates to a kind of long-range omnidirectional full channel tv receiving antenna device.

Present known isotropic receiving antenna is a rotating field omnidirectional television antenna.It is made up of two mutually perpendicular half-waves folding back oscillator quadratures, by impedance conversion and feeder line to the television set input TV signal.Because half-wave folded dipole itself can not be operated in the defective on the all-wave length, because the shortcoming of this antenna is that gain is low, and frequency band is narrow, it is less to be suitable for the television channel that receives, and therefore, fails to be extensive use of in addition.

The purpose of this utility model provides a kind of long-range omnidirectional full channel tv receiving antenna, the television frequency signal that it not only can the distance reception VHF-UHF of omnidirectional frequency range, and also simple in structure, be easy to manufacture.

The purpose of this utility model is achieved in that its active dipole is made up of the arm of the symmetrical square of four horizontal positioned, each arm interconnects with two metal tubes (or bonding jumper and angled metal material etc.) that are mutually 90 ° of angles or does not connect, and becomes a square to manufacture and forms.Four square active dipole arms symmetrical Orthogonal Composite in horizontal plane, perhaps the square active dipole arm of symmetry is divided into two-layer up and down, be fixed in the vertical rod, the square oscillator arms that is about to two-layer symmetry keeps at a certain distance away between up and down, Orthogonal Composite, with the distributing point end of four square active dipole arms, be fixed on above the box (or plate) of insulation respectively, the support vertical rod be installed in the bottom of insulation booth (or plate).In the distributing point of square active dipole arm and broadband impedance matching box, 75 Europe coaxial-cable feeder, the feeder line plug is electrically connected in proper order.Consider in the design to make this antenna compatibility be operated in VHF frequency range and UHF channel, the arm lengths of active dipole is cut metal material according to the geometric average centre wavelength of VHF-UHF frequency range.During use, vertical rod is holded up, aerial plug is inserted in the antenna jack of television set, allow television set search for a TV signal automatically, this antenna just can receive remote omnidirectional all-channel tv frequency signal.

Owing to adopt such scheme, this antenna can cover the area at electromagnetic wave, decapacitation receives beyond the TV programme signal of very high frequency(VHF) VHF1-12 channel more clearly, for superfrequency UHF13-48 channel (a large amount of at present channels that use of China) stronger receiving ability is arranged, receive through scientific experiment repeatedly and to show, its receiving range can reach the scope about circumference 300 li, and the programme channel number that television set is received increases clear picture.

Below in conjunction with drawings and Examples the utility model is further specified.Fig. 1 is an example structure schematic diagram of the present utility model.

Among the figure 1, square active dipole arm 2, plastic casing 3, vertical rod 4,75 Europe coaxial-cable feeder 5,75 Europe coaxial cable plugs locate to be distributing point at a-a ' and b-b '.

In Fig. 1, four square active dipole arms (1) symmetrical Orthogonal Composite in horizontal plane, distributing point aa ' and bb ' with four square active dipole arms (1) locates respectively, be fixed on the plastic casing (2) (or plastic plate), there is one to support vertical rod (3) in the bottom of plastic casing (2) (or plastic plate), available plastic tube of vertical rod (3) or metal are manufactured, and diameter is 15～20mm, about the about 30～60cm of its length.Entrance hole (not drawing among the figure) in plastic casing (2) is drawn one 75 Europe coaxial-cable feeder (4), installs at the not end of 75 Europe coaxial-cable feeder (4) to connect one 75 Europe feeder line plug (5).The distributing point aa ' of square active dipole arm (1) or and bb ' locate to be electrically connected with impedance transformer electronic circuit (not drawing among the figure), 75 Europe coaxial-cable feeder (4), plug (5) order.All should make structure to plastic casing (2) (or plastic plate) with rainproof effect.Be reduced volume, the other end of oscillator arms can be processed into folded dipole shape (not drawing among the figure) with bending machine.Second kind of embodiment be four square active dipole arms are divided into two-layer up and down, promptly top two square oscillators, below two square oscillators, be fixed in the vertical rod, levels keeps at a certain distance away, and symmetrical Orthogonal Composite becomes dual-layer atenna, and its reception is fine.

This antenna of making is added when using outdoor, vertical rod (3) can be bundled on other rods, it highly generally surpasses building 3m-5m such as roof, should avoid blocking of high-lager building as far as possible, is selected in place, sky ore deposit.Feeder line plug (5) is inserted in the TV set aerial jack, allow television set search for one time TV programme signal from VHF to uhf band earlier.The programme channel that searches can store in television set automatically, can carry out normal TV reception then.

Claims

1, a kind of long-range omnidirectional full channel tv receiving antenna, the distributing point of four square active dipole arms is electrically connected in proper order with broadband impedance matching box, 75 Europe coaxial-cable feeder, feeder line plug, it is characterized in that:, be fixed on plastic casing or the plastic plate four square active dipole arms (1) symmetrical Orthogonal Composite in horizontal plane.

2, long-range omnidirectional according to claim 1 full channel tv receiving antenna, it is characterized in that: four square active dipole arms (1) are divided into two-layer up and down, promptly top two symmetrical square oscillator arms (1), below two symmetrical square oscillator arms (1), at a certain distance between the upper and lower, Orthogonal Composite.

3, according to claim 1,2 described long-range omnidirectional full channel tv receiving antennas, it is characterized in that: respectively the distributing point of four square active dipole arms (1), be fixed in the plastic casing, the other end of square oscillator arms (1) is made the folded dipole shape.