Wireless communications circuit protection structure

Patent metadata

Field	Value
Publication number	US-9426871-B2
Application number	US-201414171982-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Feb 4, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

The present invention is a wireless communications circuit protection structure, in which a microstrip structure is improved and a combined structure of the microstrip structure and the coplanar waveguide (CPW) structure are improved, so that an external ground and an internal system ground may be totally separated with each other to provide electromagnetic susceptibility (EMS), electrostatic discharge (ESD), electricity leakage proofing ability, and a loss within a specific wireless communications frequency range may satisfy the wireless communications ability requirement.

First claim

What is claimed is:

1. A wireless communications circuit protection structure, comprising:
a base circuit board, comprising a first face and a second face opposed thereto;
a wireless communications signal line set, disposed on the first face, and comprising a first wireless communications signal line and a second wireless communications signal line connected thereto through a capacitor in a bridging manner;
a first grounding line set, disposed on the first face and at a side of the wireless communications signal line set, having a gap with respect to the wireless communications signal line set, and comprising a first grounding line and a second grounding line connected thereto through a capacitor in a bridging manner;
a second grounding line set, disposed on the first face and at the other side of the wireless communications signal line set, having a gap with respect to the wireless communications signal line set, and comprising a third grounding line and a fourth grounding line connected thereto through a capacitor in a bridging manner; and
a third grounding line set, disposed on the second face and comprising a fifth grounding line and a sixth grounding line connected thereto through a capacitor in a bridging manner;
wherein the first grounding line, the third grounding line and the fifth grounding line are defined as being externally grounded, and the second grounding line, the fourth grounding line and the sixth grounding line are defined as being systematically grounded.

2. The wireless communications circuit protection structure as claimed in claim 1 , having a loss smaller than 1 dB in a frequency range between 800 MHz and 6 GHz.

3. The wireless communications circuit protection structure as claimed in claim 1 , wherein the second wireless communications signal line is further connected to at least an electromagnetic susceptibility (EMS) component set in series, the EMS component set comprising the capacitor and an inductance, the capacitor being connected to a system ground through the inductance.

4. The wireless communications circuit protection structure as claimed in claim 1 , wherein a contact discharging test for 8 KV of electrostatic discharge (ESD) is satisfied.

5. The wireless communications circuit protection structure as claimed in claim 1 , wherein a contact discharging test for 8 KV of electrostatic discharge (ESD) is satisfied.

6. A wireless communications circuit protection structure, comprising:
a base circuit board, comprising a first face and a second face opposed thereto;
a wireless communications signal line set, disposed on the first face, and comprising a first wireless communications signal line and a second wireless communications signal line connected thereto through a capacitor in a bridging manner; and
a third grounding line set, disposed on the second face and comprising a fifth grounding line and a sixth grounding line connected thereto through a capacitor in a bridging manner;
wherein the fifth grounding line are defined as being externally grounded, respectively, and the sixth grounding line are defined as being systematically grounded, respectively.

7. The wireless communications circuit protection structure as claimed in claim 6 , having a loss smaller than 1.2 dB in a frequency range between 800 MHz and 2.4 GHz.

8. The wireless communications circuit protection structure as claimed in claim 6 , wherein the second wireless communications signal line is further connected to at least an electromagnetic susceptibility (EMS) component set in series, the EMS component set comprising the capacitor and an inductance, the capacitor being connected to a system ground through the inductance.

Assignees

• Moxa Inc

Inventors

• Hung Chung-En
• Liu Hsin-Hung

Classifications

• H05F3/02 Primary

  by means of earthing connections · CPC title

• H05K1/0259

  Electrostatic discharge [ESD] protection · CPC title

• H05K1/0231

  Capacitors or dielectric substances · CPC title

• H05K1/0227 Primary

  Split or nearly split shielding or ground planes · CPC title