Shielded microphone for mobile communications device
First Claim
1. A shielded microphone assembly for use in a communications device having a circuit board and a housing, and in use being proximate to an antenna, said microphone assembly comprising:
- a. a microphone;
b. a conductive, electromagnetic shield over said microphone; and
, c. a resilient separator over said electromagnetic shield;
wherein said assembly is configured to co-operate with said housing and said circuit board to electrically connect each of said microphone and said electromagnetic shield to said circuit board, said electromagnetic shield being thereby grounded, upon loading said housing onto said separator and said electromagnetic shield onto said circuit board, thereby enclosing said microphone between said circuit board and said electromagnetic shield.
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0 Petitions
Accused Products
Abstract
A shielded microphone, and method for shielding a microphone, are provided for use in a communications device having a circuit board and a microphone, especially where the device also has an antenna in close proximity to the microphone. The microphone is provided in an electromagnetic shield (e.g. formed as a shielding can) and a resilient separator (e.g. o-ring or disk) is provided over the shield. The device housing is stacked over the separator and shield, while the latter are stacked over the circuit board so that the separator and shield, with microphone there under, are sandwiched between the housing and the circuit board. By this sandwiching the separator is loaded onto the shield to drive the shield directly against the circuit board to make an electrical ground connection therewith, the microphone also being electrically connected to the printed circuit board. The microphone is thereby enclosed between the circuit board and the shield, such that the shield shields the microphone against electromagnetic energy radiated by the proximate antenna. The resilience of the separator accommodates the variation in the stacking of the components.
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Citations
20 Claims
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1. A shielded microphone assembly for use in a communications device having a circuit board and a housing, and in use being proximate to an antenna, said microphone assembly comprising:
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a. a microphone;
b. a conductive, electromagnetic shield over said microphone; and
,c. a resilient separator over said electromagnetic shield;
wherein said assembly is configured to co-operate with said housing and said circuit board to electrically connect each of said microphone and said electromagnetic shield to said circuit board, said electromagnetic shield being thereby grounded, upon loading said housing onto said separator and said electromagnetic shield onto said circuit board, thereby enclosing said microphone between said circuit board and said electromagnetic shield. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of shielding a microphone in a communications device having a circuit board and a housing, said device being used with an antenna either as part of said device or in proximity to said device, the method comprising:
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a. shielding said microphone with a conductive, electromagnetic shield over said microphone;
b. providing a resilient separator over said electromagnetic shield; and
,c. sandwiching said shielded microphone and separator between said housing and said circuit board;
whereby said shielded microphone and separator are configured to co-operate with said housing and said circuit board to electrically connect each of said microphone and said electromagnetic shield to said circuit board, said electromagnetic shield being thereby grounded, said sandwiching producing a loading of said housing onto said separator and said electromagnetic shield onto said circuit board, thereby enclosing said microphone between said circuit board and said electromagnetic shield. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification