# US 9,038,949 B2 · Radio frequency shielding system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,038,949 B2
- Document ID: US9038949B2
- Status: Granted
- Kind: B2
- Application number: 14/270,302
- Filed: 2014-05-05
- Published: 2014-09-25
- Granted: 2015-05-26
- Earliest claimed: 2007-06-18
- Assignees: The Boeing Company
- Applicants: The Boeing Company
- Inventors: Kenneth P. Kirchoff; Patrick M. Njeim; Thomas K. Morrow; Joel J. Peterson; Michael R. Sirkis; Ryan L. Carlson; Bruce J. Donham; Jim Sears
- Web page: https://patentgrep.com/patent/US9038949B2

## CPC

- B64C 1/1484: {Windows (B64C1/1492 takes precedence)}
- B64C 1/1492: {Structure and mounting of the transparent elements in the window or windscreen}
- B64D 45/0063: {by avoiding the use of electronic equipment during flight, e.g. of mobile phones or laptops}
- H05K 9/0018: {with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables}
- B64C: AEROPLANES; HELICOPTERS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

An assembly for shielding an aircraft from electromagnetic energy may include a window mounting configured to be conductively coupled to an aperture in a fuselage of an aircraft. The window mounting may include a window pane having an electromagnetically-reflective coating for reflecting electromagnetic energy. The window pane may remain electrically isolated from the fuselage prior to the electromagnetic energy exceeding a frequency of approximately 1 GHz. The window mounting may further include a capacitive gasket capacitively coupling the window pane to the fuselage after the frequency of the electromagnetic energy reflected by the window pane exceeds approximately 1 GHz.

## Claims

### Claim 1

An assembly for shielding an aircraft from electromagnetic energy, comprising:
a window mounting configured to be conductively coupled to an aperture in a fuselage of an aircraft, the window mounting including:
a window pane having an electromagnetically-reflective coating for reflecting electromagnetic energy, the window pane remaining electrically isolated from the fuselage prior to the electromagnetic energy exceeding a frequency of approximately 1 GHz; and
a capacitive gasket capacitively coupling the window pane to the fuselage after the frequency of the electromagnetic energy reflected by the window pane exceeds approximately 1 GHz.

### Claim 2 (depends on 1)

The assembly according to claim 1, wherein the window mounting further comprises:
a window forging configured to conductively couple the window mounting to the fuselage.

### Claim 3 (depends on 2)

The assembly according to claim 2, wherein:
the capacitive gasket comprises an elastomeric matrix providing a seal between the window pane and the window forging.

### Claim 4 (depends on 3)

The assembly according to claim 3, wherein:
the capacitive gasket includes a conductive media for conducting electromagnetic energy from the window pane to the window forging.

### Claim 5 (depends on 4)

The assembly according to claim 4, wherein:
the conductive media comprises carbon black.

### Claim 6 (depends on 1)

The assembly according to claim 1, wherein:
the window mounting includes an electronically dimmable window.

### Claim 7 (depends on 6)

The assembly according to claim 6, further comprising:
a bellows seal mating the electronically dimmable window to the window mounting.

### Claim 8 (depends on 7)

The assembly according to claim 7, wherein:
the bellows seal includes an electrically conductive coating electrically coupling the electronically dimmable window to the window mounting.

### Claim 9 (depends on 8)

The assembly according to claim 8, wherein the electrically conductive coating comprises:
an electrically conductive silicone ink with 87% silver when cured.

### Claim 10 (depends on 1)

The assembly according to claim 1, wherein the assembly attenuates greater than about 20 decibels (dB) of electromagnetic (EM) energy in a frequency range of from about 380 Mega Hertz (MHz) to about 10.6 Giga Hertz (GHz).

### Claim 11 (depends on 10)

The assembly according to claim 10, wherein the assembly attenuates about 30 dB of EM energy in a frequency range of from about 380 MHz to about 10.6 GHz.

### Claim 12

A system for shielding an aircraft from electromagnetic energy, the system comprising:
a fuselage providing an electrically conductive envelope;
an aperture disposed in the fuselage;
a window mounting mounted in the aperture of and conductively coupled to the fuselage, the window mounting including:
a window pane having an electromagnetically-reflective coating for reflecting electromagnetic energy, the window pane remaining electrically isolated from the fuselage prior to the electromagnetic energy exceeding a frequency of approximately 1 GHz; and
a capacitive gasket capacitively coupling the window pane to the fuselage after the frequency of the electromagnetic energy reflected by the window pane exceeds approximately 1 GHz.

### Claim 13 (depends on 12)

The system according to claim 12, wherein the window mounting further comprises:
a window forging configured to conductively couple the window mounting to the fuselage.

### Claim 14 (depends on 13)

The system according to claim 13, wherein:
the capacitive gasket comprises an elastomeric matrix providing a seal between the window pane and the window forging.

### Claim 15 (depends on 14)

The system according to claim 14, wherein:
the capacitive gasket includes a conductive media for conducting electromagnetic energy from the window pane to the window forging.

### Claim 16 (depends on 13)

The system according to claim 13, wherein:
the window mounting includes an electronically dimmable window.

### Claim 17 (depends on 16)

The system according to claim 16, further comprising:
a bellows seal mating the electronically dimmable window to the window mounting.

### Claim 18 (depends on 17)

The system according to claim 17, wherein:
the bellows seal includes an electrically conductive coating electrically coupling the electronically dimmable window to the window mounting.

### Claim 19 (depends on 13)

The system according to claim 13, wherein:
the system attenuates greater than about 20 decibels (dB) of electromagnetic (EM) energy in a frequency range of from about 380 Mega Hertz (MHz) to about 10.6 Giga Hertz (GHz).

### Claim 20

An aircraft, comprising:
a fuselage providing an electrically conductive envelope;
an aperture disposed in the fuselage;
a window mounting mounted in the aperture of and conductively coupled to the fuselage, the window mounting including:
an outer window pane having an electromagnetically-reflective coating for reflecting electromagnetic energy, the outer window pane remaining electrically isolated from the fuselage prior to the electromagnetic energy exceeding a frequency of approximately 1 GHz; and
a capacitive gasket capcaitively coupling the outer window pane to the fuselage after the frequency of the electromagnetic energy reflected by the outer window pane exceeds approximately 1 GHz; and
an electronically dimmable inner window.