Wristband with loop antenna
First Claim
Patent Images
1. An apparatus comprising:
- a radio receiver disposed in a housing having a band suitable for attaching to an object;
an antenna having a substantially constant resonant frequency said antenna comprising a gear rack positioned contiguous to said band; and
adjusting means for adjusting the length of said antenna, said adjusting means being positioned contiguous to said apparatus and to said antenna and comprising a spur gear wheel mechanism for engaging said antenna.
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Abstract
An apparatus for adjusting the length of a single segment loop antenna while automatically compensating for the antenna so as to maintain a substantially constant resonant frequency thereof.
58 Citations
10 Claims
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1. An apparatus comprising:
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a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency said antenna comprising a gear rack positioned contiguous to said band; and adjusting means for adjusting the length of said antenna, said adjusting means being positioned contiguous to said apparatus and to said antenna and comprising a spur gear wheel mechanism for engaging said antenna. - View Dependent Claims (2, 3)
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4. A selective call receiver comprising:
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receiver means disposed in a housing having a band suitable for attaching to an object; antenna means disposed in said band and coupled to said receiver means, said antenna means comprises a gear rack; and adjustment means for adjusting said band so as to fasten said receiver means to a wrist, said antenna means having a substantially constant resonant frequency, said adjustment means comprises a spur gear wheel mechanism for engaging said antenna means, thereby forming a closed loop electrical circuit. - View Dependent Claims (5, 6, 7)
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8. An apparatus comprising:
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a radio receiver disposed in a housing having a band suitable for attaching to an object; an antenna having a substantially constant resonant frequency, said antenna positioned contiguous to said band; and manually rotatable adjustment means for adjusting the length of said antenna; and
for maintaining said substantially constant resonant frequency of said antenna, said manually rotatable adjustment means being positioned contiguous to said apparatus and to said antenna and comprising a mechanism for engaging said antenna. - View Dependent Claims (9, 10)
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Specification