A logarithmic television receiving antenna feed matching port

Abstract

The utility model relates to a kind of ground wave digital television signal receiving antenna technology.The utility model discloses a kind of logarithmic formula television receiving antenna feed matching port, including the coaxial cable and PCB single panel connected with logarithmic formula television receiving antenna feed end, PCB single panel includes the copper foil layer being set in upper portion and the PCB resin layer being set in lower portion, coaxial cable one end is equipped with net knitting, the other end is bare core wire, net knitting and core wire are respectively connected with PCB resin layer.PCB resin layer one end is connected in the net knitting of coaxial cable, the other end is pressed in coaxial cable core wire 2 connecting end, the copper foil layer of PCB single panel and core wire connecting end are isolated by PCB resin layer and form distributed capacitor, this distributed capacitor compensates the impedance mismatch caused by the tiny inductance of coaxial cable core wire lead line cross connection;Realize a kind of logarithmic formula television receiving antenna feed matching port;So as to realize the beneficial effect of improving the transmission efficiency of antenna.

Description

Technical Field

[0001] This utility model relates to a terrestrial wave digital television signal receiving antenna technology. Background Technology

[0002] Currently, logarithmic TV receiving antennas on the market suffer from impedance mismatch because the coaxial cable at the feed end is connected to the antenna port, and the mesh and core wires are connected to the feed end of the logarithmic antenna respectively. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a logarithmic television receiving antenna feed matching port.

[0004] This utility model discloses a logarithmic television receiving antenna feed matching port, comprising a coaxial cable and a PCB single-sided board connected to the feed end of the logarithmic television receiving antenna. The PCB single-sided board includes a copper foil layer on the upper part and a PCB resin layer on the lower part. One end of the coaxial cable has a braided mesh, and the other end has an exposed core wire. The braided mesh and the core wire are connected in parallel with the PCB resin layer. A distributed capacitance is formed between the copper foil layer and the core wire connection end of the PCB single-sided board through the PCB resin layer. One end of the PCB resin layer is connected to the braided mesh of the coaxial cable, and the other end is pressed against the connection end of the core wire 2 of the coaxial cable. The distributed capacitance is formed between the copper foil layer and the core wire connection end of the PCB single-sided board through the PCB resin layer. This distributed capacitance compensates for the impedance mismatch caused by the small inductance value of the coaxial cable core wire lead bridging; thus realizing a logarithmic television receiving antenna feed matching port; thereby achieving the beneficial effect of improving the transmission efficiency of the antenna.

[0005] The beneficial effects of this utility model are as follows: a distributed capacitor is formed between the copper foil layer and the core wire connection end of the PCB single-sided board through the PCB resin layer. This distributed capacitor compensates for the impedance mismatch caused by the small inductance value of the coaxial cable core wire lead bridging; a logarithmic TV receiving antenna feed matching port is realized; thereby achieving the beneficial effect of improving the transmission efficiency of the antenna. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a logarithmic television receiving antenna three-dimensional structure.

[0007] Figure 2 for Figure 1 A magnified view of a portion of the view.

[0008] The markings in the diagram are: 1. Mesh braid, 2. Core wire, 3. PCB single-sided board, 4. Copper foil layer, 5. PCB resin layer. Detailed Implementation

[0009] The present invention will now be described in further detail with reference to the accompanying drawings, but it should not be construed as limiting the scope of the subject matter of the present invention to the above embodiments.

[0010] like Figure 1-2 As shown, a logarithmic TV receiving antenna feed matching port includes a coaxial cable and a PCB single-sided board 3 connected to the feed end of the logarithmic TV receiving antenna. The PCB single-sided board 3 includes a copper foil layer 4 on the upper part and a PCB resin layer 5 on the lower part. One end of the coaxial cable has a braided mesh 1, and the other end is an exposed core wire 2. The braided mesh 1 and the core wire 2 are connected in parallel to the PCB resin layer 5. One end of the PCB resin layer 5 is connected to the braided mesh 1 end of the coaxial cable, and the other end is pressed against the connection end of the core wire 2 of the coaxial cable. The copper foil layer 4 and the connection end of the core wire 2 of the PCB single-sided board 3 are isolated by the PCB resin layer 5 to form a distributed capacitance. This distributed capacitance compensates for the impedance mismatch caused by the small inductance value of the lead of the core wire 2 of the coaxial cable. This realizes a logarithmic TV receiving antenna feed matching port, thereby achieving the beneficial effect of improving the transmission efficiency of the antenna.

Claims

1. A logarithmic television receiving antenna feed matching port, comprising a coaxial cable connected to the feed end of the logarithmic television receiving antenna, characterized in that, It also includes a PCB single-sided board, which includes a copper foil layer on the upper part and a PCB resin layer on the lower part. One end of the coaxial cable is equipped with a braid and the other end is an exposed core wire. The braid and the core wire are connected in parallel with the PCB resin layer. The copper foil layer and the core wire connection end of the PCB single-sided board are isolated by the PCB resin layer to form a distributed capacitance.

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