Arrayed-segment loop antenna

A loop antenna, for use with a communication device, operating for exchanging energy at one or more radiation frequencies, comprising,

• connection means having two or more conductors for coupling of electrical current,
• a plurality of radiation loops, each of said loops including a plurality of electrically conducting segments each having a segment length where,
• said segments are electrically connected in series between ones of said conductors for exchange of energy at one of said radiation frequencies, said loop having an electrical length, Al that is proportional to the sum of segment lengths for each of said radiation segments,
• said segments are arrayed in a pattern to form a loop antenna having an irregular shape where different segments connect at vertices and conduct electrical current in different directions near said vertices and where said segments are arrayed in an irregular pattern.

A loop antenna, for use with a communication device having an antenna area, for exchanging energy at a radiation frequency, comprising,

• a transmission line having first and second conductors for non-radiating conduction of electrical current,
• a plurality of electrically conducting segments each having a segment length where,
• said segments are connected in series to form a loop electrically connected between said first and second conductors where said loop has an electrical length, Al that is proportional to the sum of segment lengths for each of said segments and that facilitates exchange of energy at the radiation frequency, and where said loop is represented by a virtual circle of radius R2 having a perimeter length equal to π(2R2) that defines a virtual maximum second enclosed area of π(R2)2,
• said segments are arrayed in a pattern to form a loop antenna having an irregular shape that has an enclosed area of π(R1)2 that is represented by a circle of perimeter equal to π(2R1) that defines a virtual first enclosed area of π(R1)2 where R1 is substantially less than R2 and the virtual first enclosed area of π(R1)2 is substantially less than the virtual maximum second enclosed area of π(R2)2 but where the electrical length, Al, is proportional approximately to π(2R2).

A loop antenna, for use with a communication device having an antenna area, for exchanging energy at a radiation frequency, comprising,

• a base for supporting said antenna within said antenna area,
• a transmission line mounted on said base and having first and second conductors for non-radiating conduction of electrical current,
• a plurality of electrically conducting segments mounted on said base, each segment having a segment length where,
• said segments are connected in series to form a loop electrically connected between said first and second conductors where said loop has an electrical length, Al that is proportional to the sum of segment lengths for each of said segments and that facilitates exchange of energy at the radiation frequency, and where said loop is represented by a virtual circle of radius R2 having a perimeter length equal to π(2R2) that defines a virtual maximum second enclosed area of π(R2)2,
• said segments are arrayed in a pattern to form a loop antenna having an irregular shape that has an enclosed area of π(R1)2 that is represented by a circle of perimeter equal to π(2R1) that defines a virtual first enclosed area of π(R1)2 where R1 is substantially less than R2 and the virtual first enclosed area of π(R1)2 is substantially less than the virtual maximum second enclosed area of π(R2)2 but where the electrical length, Al, is proportional approximately to π(2R2).

A loop antenna, for use with a communication device having an antenna area, for exchanging energy at a radiation frequency, comprising,

• a base for supporting said antenna within said antenna area,
• a transmission line mounted on said base and having first and second conductors for non-radiating conduction of electrical current,
• a plurality of electrically conducting segments mounted on said base, each segment having a segment length where,
• said segments are connected in series to form a loop electrically connected between said first and second conductors where said loop has an electrical length, Al that is proportional to the sum of segment lengths for each of said segments and that facilitates exchange of energy at the radiation frequency, and where said loop is represented by a virtual circle of radius R2 having a perimeter length equal to π(2R2) that defines a first virtual maximum enclosed area of π(R2)2,
• said segments are arrayed in a pattern to form a loop antenna having an irregular shape that has an enclosed area of π(R1)2 that is represented by a circle of perimeter equal to π(2R1) that defines a virtual first enclosed area of π(R1)2 where R1 is substantially less than R2 and the virtual first enclosed area of π(R1)2 is substantially less than the virtual maximum second enclosed area of π(R2)2 but where the electrical length, Al, is proportional approximately to π(2R2), said segments arrayed to reduce the E field magnitude whereby low SAR is achieved in said particular direction.

A loop antenna, for use with a communication device, operating for exchanging energy at a radiation frequency, comprising,

• connection means having first and second conductors for conduction of electrical current,
• a radiation loop including a plurality of electrically conducting segments each having a segment length where,
• said segments are electrically connected in series between said first and second conductors for exchange of energy at the radiation frequency, said loop having an electrical length, Al that is proportional to the sum of segment lengths for each of said radiation segments,
• said segments are arrayed in an irregular pattern to form a loop antenna where different segments connect at vertices and conduct electrical current in a number of irregular and different directions.