# US 8,786,513 B2 · Device and grounding device for enhancing EMS and wireless communication device

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- Number: US 8,786,513 B2
- Document ID: US8786513B2
- Status: Granted
- Kind: B2
- Application number: 13/566,383
- Filed: 2012-08-03
- Published: 2013-07-04
- Granted: 2014-07-22
- Earliest claimed: 2012-01-03
- Assignees: Climax Technology Co., Ltd.
- Applicants: Hsiao-Pin Liang; Dau-Chyrh Chang; Cheng-Wei Chen
- Inventors: Hsiao-Pin Liang; Dau-Chyrh Chang; Cheng-Wei Chen
- Web page: https://patentgrep.com/patent/US8786513B2

## CPC

- H01Q 1/38: formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142)}
- H01Q 1/48: Earthing means; Earth screens; Counterpoises
- H05K 1/0227: {Split or nearly split shielding or ground planes}
- H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
- H05K 1/0243: {Printed circuits associated with mounted high frequency components}
- H05K 1/0245: {Lay-out of balanced signal pairs, e.g. differential lines or twisted lines}
- H05K 2201/10098: Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A device for enhancing electromagnetic susceptibility comprises a first bridge. The first bridge is near to a first trace of a differential pair routing and electrically connects an RF grounding with an analog grounding. The RF grounding and the analog grounding are separated. The differential pair routing transmits signals between an RF circuit and an analog circuit. The first trace of the differential pair routing is closer to an antenna coupled to the RF grounding than a second trace of the differential pair routing. The RF circuit is coupled to the RF grounding, and the analog circuit is coupled to the analog grounding.

## Claims

### Claim 1

A device for enhancing electromagnetic susceptibility, comprising:
a first bridge, arranged near to a first trace of a differential pair routing and electrically connecting a radio frequency (RF) grounding with a analog grounding, wherein the RF grounding and the analog grounding are separated, the differential pair routing transmits signals between an RF circuit and an analog circuit, the first trace of the differential pair routing is closer to an antenna coupled to the RF grounding than a second trace of the differential pair routing, the RF circuit is coupled to the RF grounding, and the analog circuit is coupled to the analog grounding.

### Claim 2 (depends on 1)

The device as claimed in claim 1, further comprising:
a second bridge, arranged near to the second trace of the differential pair routing and electrically connecting the RF grounding with the analog grounding.

### Claim 3

A grounding device for enhancing electromagnetic susceptibility, comprising:
an RF grounding;
an analog grounding, separated from the RF grounding; and
a first bridge, arranged near to a first trace of a differential pair routing and electrically connecting the RF grounding with the analog grounding, wherein the differential pair routing transmits signals between an RF circuit and an analog circuit, the first trace of the differential pair routing is closer to an antenna coupled to the RF grounding than a second trace of the differential pair routing, the RF circuit is coupled to the RF grounding, and the analog circuit is coupled to the analog grounding.

### Claim 4 (depends on 3)

The device as claimed in claim 3, further comprising:
a second bridge, arranged near to the second trace of the differential pair routing and electrically connecting the RF grounding with the analog grounding.

### Claim 5

A wireless communication device, comprising:
a circuit board, wherein a layer of the circuit board comprises an RF grounding and an analog grounding, the RF grounding and the analog grounding are separated, the RF grounding is coupled to an RF circuit, and the analog grounding is coupled to an analog circuit;
an antenna, arranged on the circuit board and coupled to the RF grounding;
a differential pair routing, transmitting signals between the RF circuit and the analog circuit and comprising a first trace and a second trace, wherein the first trace is closer to the antenna than the second trace; and
a first bridge, arranged near to the first trace of the differential pair routing and electrically connecting the RF grounding with the analog grounding.

### Claim 6 (depends on 5)

The wireless communication device as claimed in claim 5, further comprising:
a second bridge, arranged near to the second trace of the differential pair routing and electrically connecting the RF grounding with the analog grounding.

### Claim 7 (depends on 6)

The wireless communication device as claimed in claim 6, wherein the antenna is a printed inverted-F antenna.

### Claim 8 (depends on 7)

The wireless communication device as claimed in claim 7, wherein the RF circuit is an integrated RF module and the analog circuit is an integrated analog module.

### Claim 9 (depends on 5)

The wireless communication device as claimed in claim 5, wherein the circuit board is a printed circuit board.