USB cable antenna

Patent metadata

Field	Value
Publication number	US-9431697-B2
Application number	US-201214117679-A
Country	US
Kind code	B2
Filing date	Apr 11, 2012
Priority date	May 18, 2011
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

There is provided a USB cable antenna which also uses a USB cable as an antenna that receives a high-frequency signal in a desired band, by connecting a metal shield of the USB cable to an ID terminal of a USB connector connected to the USB cable of a predetermined length connected to an information terminal device, connecting a high-frequency cutoff element having a high impedance for the high-frequency signal in the desired band to both ends of a power supply line and a ground line of the USB cable, and connecting a common mode choke having the high impedance for the high-frequency signal in the desired band to both ends of a transmission line of a differential signal of the USB cable.

First claim

The invention claimed is:

1. A USB cable antenna suitable for acting as both a USB cable and as an antenna for receiving a high-frequency signal in a desired band, the USB cable antenna comprising:
a metal shield connected to an identification (ID) terminal of a cable-side USB connector connectable to an information terminal device;
a high-frequency cutoff elements having a high impedance for the high-frequency signal in the desired band and connected to both ends of a power supply line and a ground line of the USB cable; and
common mode chokes having the high impedance for the high-frequency signal in the desired band and connected to both ends of a transmission line of a differential signal of the USB cable.

2. The USB cable antenna according to claim 1 ,
wherein the high-frequency signal in the desired band received by the antenna is a signal of one or a plurality of bands of a FM band, a VHF band, and a UHF band.

3. The USB cable antenna according to claim 2 ,
wherein a resistor to identify a type of the USB cable connected to the ID terminal is connected between an ID line to which the ID terminal is connected and the ground line of the USB cable.

4. The USB cable antenna according to claim 3 ,
wherein the high-frequency cutoff element has the high impedance when a current flows to the power supply line.

5. The USB cable antenna according to claim 4 ,
wherein a DC resistance of the high-frequency cutoff element inserted into the ground line is 0.25Ω or less.

6. The USB cable antenna according to claim 1 ,
wherein the impedance of the common mode choke in the desired band inserted into both ends of D− and D+ differential signal lines of the USB cable is 90Ω or more.

Assignees

• Yoshino Yoshitaka
• Tsuboi Satoru
• Sony Corp

Inventors

• Yoshino Yoshitaka
• Tsuboi Satoru

Classifications

• H01Q1/2275 Primary

  associated to expansion card or bus, e.g. in PCMCIA, PC cards, Wireless USB · CPC title

• H01Q1/50 Primary

  Structural association of antennas with earthing switches, lead-in devices or lightning protectors · CPC title

• H01Q1/46 Primary

  Electric supply lines or communication lines · CPC title

• H01Q1/44

  using equipment having another main function to serve additionally as an antenna {, e.g. means for giving an antenna an aesthetic aspect}(H01Q1/27 - H01Q1/34 take precedence) · CPC title