Mobile radio telephone with booster unit
First Claim
1. A mobile radio telephone including a portable unit and a booster unit, and operable in two modes, a first mode in which the portable unit is used to receive and transmit signals and a second mode in which the portable unit and booster unit are used in combination to receive and transmit signals, said portable unit comprising first receiver means for producing intermediate frequency signals in said portable unit from signals received by said portable unit when operating the mobile radio telephone in said first mode;
- said booster unit comprising second receiver means for producing intermediate frequency signals in said booster unit from signals received by said booster unit; and
link means for providing a transmission path between said portable unit and booster unit, to enable said portable unit to receive the intermediate frequency signals produced by said second receiver means when operating the mobile radio telephone in the second mode;
said first and said second receiver means each including a mixer for producing said intermediate frequency signals wherein said mixer of said second receiver means is of a higher specification than said mixer of said first receiver means.
4 Assignments
0 Petitions
Accused Products
Abstract
A mobile radio telephone includes a hand-portable unit 1 and a booster unit 3. A coaxial cable 25 is arranged to produce a link between the intermediate frequency signals produced by the booster unit and RF signals produced by the hand-portable unit 1.
60 Citations
13 Claims
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1. A mobile radio telephone including a portable unit and a booster unit, and operable in two modes, a first mode in which the portable unit is used to receive and transmit signals and a second mode in which the portable unit and booster unit are used in combination to receive and transmit signals, said portable unit comprising first receiver means for producing intermediate frequency signals in said portable unit from signals received by said portable unit when operating the mobile radio telephone in said first mode;
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said booster unit comprising second receiver means for producing intermediate frequency signals in said booster unit from signals received by said booster unit; and link means for providing a transmission path between said portable unit and booster unit, to enable said portable unit to receive the intermediate frequency signals produced by said second receiver means when operating the mobile radio telephone in the second mode; said first and said second receiver means each including a mixer for producing said intermediate frequency signals wherein said mixer of said second receiver means is of a higher specification than said mixer of said first receiver means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mobile radio telephone including a portable unit and a booster unit, and operable in two modes, a first mode in which the portable unit is used to receive and transmit signals and a second mode in which the portable unit and booster unit are used in combination to receive and transmit signals,
said portable unit comprising first receiver means for producing intermediate frequency signals in said portable unit from signals received by said portable unit when operating the mobile radio telephone in said first mode; -
said booster unit comprising second receiver means for producing intermediate frequency signals in said booster unit from signals received by said booster unit; and link means for providing a transmission path between said portable unit and booster unit, to enable said portable unit to receive the intermediate frequency signals produced by said second receiver means when operating the mobile radio telephone in the second mode, said portable unit and said booster unit including respective reactive combiner means effective to receive signals transmitted along said transmission path from the other unit and in which each of said reactive combiner means consists of a single capacitive and a single inductive element. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification