Cobra antenna

A cobra and antenna technology, applied in antennas, resonant antennas, antenna components, etc., can solve the problems of antenna impedance increase and impedance reduction, and achieve the effect of reducing restrictions
CN102804500AInactive Publication Date: 2012-11-28SONY CORP
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SONY CORP
Publication Date
2012-11-28
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Disclosed is a cobra antenna which is small, has a superior antenna gain performance, and receives minimum influence from the length of a coaxial wire. An antenna element having a length corresponding to a frequency of a broadcast wave to be received and a coaxial wire are connected to a relay unit which functions as a feeding point. A ferrite core around which the axial wire is wound one to three times is arranged at a position in the axial wire which is spaced from the relay unit by the same length as the length from the relay unit to the antenna element, and a high frequency blocking unit for blocking a high frequency current from the coaxial wire is provided on the front side of a connector of a receiving device to which the other side of the coaxial wire is connected.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a cobra antenna which can be used as an antenna for a wide frequency band range from FM band to UHF band and which can be realized with a simple structure. Background technique

[0002] Various forms of antennas are generally used as antennas for receiving various broadcast waves such as TV broadcasts or FM broadcasts. For example, dipole antennas or Yagi-Uda antennas are commonly used to receive TV broadcasts and FM radio.

[0003] On the other hand, various broadcast waves are increasingly being received indoors, in a car, or while walking. Antennas used in such cases must be easy to handle, for example, to fit or install.

[0004] Such easy-to-assemble or easy-to-handle antennas are typified by dipole antennas realized with simple-structural antenna elements. A cobra antenna is known as a specific embodiment of a dipole antenna. The cobra antenna is used by winding several turns of a coaxial wire around an iron c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More