Electromagnetic coupler system
First Claim
1. An electromagnetic coupler system for wired and wireless information networks to provide connectivity through walls and ceilings without their alteration, comprising:
- a transceiver with data controller providing bridging of wired or wireless signals to modulated Rf frequencies;
an electromagnetic coupling device of predetermined design for transmission and reception of information modulated radio frequencies through walls and ceilings with low transmission power losses; and
a radio frequency conductive and reflective structure forming an electromagnetic low volume radiation field inside a wall or ceiling in interaction with a resonating means placed close to a wall or ceiling.
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Abstract
This invention makes it possible to communicate through solid non-metallic walls or ceilings with low microwave power levels. RF beam forming couplers are driven by common LAN (Local Area Network) circuits.
For connection to a LAN segment at the other side of a wall or ceiling, transceiver 4 transmits data modulated microwave RF to coupler 6 through a directional step attenuator 10. The reduced signal is received by the coupler system at the other side with a power level low enough to eliminate wireless detection from the outside. However, the directional step attenuator on the receive side reduces the signal power only by an insignificant amount due to its low directional losses during receive signal flow. Each coupler'"'"'s geometry is minimizing the radiation exposed material volume by RF field concentration, therefore, enabling transmission through thick concrete walls at microwave frequencies without compromising privacy. When used as wireless access point, coupler transmits through a floor to wireless devices below. The preferred embodiment operates in the 5-GHz ISM band.
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Citations
12 Claims
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1. An electromagnetic coupler system for wired and wireless information networks to provide connectivity through walls and ceilings without their alteration, comprising:
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a transceiver with data controller providing bridging of wired or wireless signals to modulated Rf frequencies;
an electromagnetic coupling device of predetermined design for transmission and reception of information modulated radio frequencies through walls and ceilings with low transmission power losses; and
a radio frequency conductive and reflective structure forming an electromagnetic low volume radiation field inside a wall or ceiling in interaction with a resonating means placed close to a wall or ceiling. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12)
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6. A radio frequency directional step attenuator where attenuation is determined by the direction of signal flow, comprising:
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a plurality of said isolating means with impedance matched ports for forward and backward signal flow; and
a plurality of manually operated low cross talk switching means are providing impedance matched bidrectional operation of engaged said isolating means. - View Dependent Claims (7)
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Specification