Digital television transmitting antenna of horn structure

Abstract

The invention relates to a digital television transmitting antenna of a horn structure. The digital television transmitting antenna of the horn structure comprises a horn shaped dipole array, a branch feeder conductor, a multi-section wideband tunable power divider network, an input connector and a reflector plate; the horn shaped dipole array is composed of multiple pairs of horn shaped dipoles in a coaxial arrangement and forms a horizontally polarized antenna array; an output end of the multi-section wideband tunable power divider network is connected with the branch feeder conductor; the branch feeder conductor and an inner surface of a metal tube form a coaxial line; the branch feeder conductor stretches out from one dipole of each pair of the horn shaped diploes, and is connected with another dipole; an outer conductor of the input connector is fixed on the reflector plate, and an inner conductor of the input connector penetrates through the reflector plate and is connected with an input end of the multi-section wideband tunable power divider network. The digital television transmitting antenna of the horn structure provided by the invention satisfies the use requirement in a terrestrial radio and television transmitting system by improving the impedance bandwidth and power handling of array antennas, and has the characteristics of being wide in working band, small in input standing-wave ratio, high in power handling, simple in processing, easy in debugging and the like.

Description

technical field [0001] The invention relates to a digital TV transmitting antenna, in particular to a horn-shaped dipole horizontally polarized array antenna suitable for a UHF band terrestrial digital TV transmitting system. Background technique [0002] In the broadcasting and television system, the transmitting antenna is an important part and plays a very important role. The performance of the antenna is directly related to the actual coverage of the signal and the quality of the broadcast signal. With the introduction of my country's "Terrestrial Digital TV Broadcasting Coverage Network Development Plan" in 2012, the promotion and application of terrestrial digital TV has been raised to a strategic level. Correspondingly, higher standards have been put forward for radio and television technical equipment. Using high-quality antennas can effectively use the power of the transmitter and reduce the requirements on the receiver. With the continuous acceleration of global...

AI Technical Summary

Problems solved by technology

However, general dipole antennas have problems such as low gain and narrow impedance bandwidth.

At the same time, due to the unbalanced coaxial feed, the radiation characteristics of the antenna are affected. These problems make the dipole antenna face obstacles in many applications, so the dipole antenna wants to be widely used in the terrestrial digital TV transmitting antenna system , it is necessary to solve the above problems

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