1.-13. (canceled).
14. Portable receiver, comprising two antennae (10, 20) designed to receive an external electromagnetic signal in a given frequency range and orientated along different axes, two phase shifter circuits (12, 22) being each connected to one antenna, and multiplexing means (24) to which are connected in input said phase shifter circuits and in output a receiving unit, characterised in that, between at least one of said phase shifter circuits and the antenna connected to this circuit, this receiver also comprises correction means (Rcor, Ccor) allowing the transfer functions (Vout1Vin1 and Vout2Vin2) of each of the sub-circuits comprising the phase shifter circuits to be balanced.
15. Portable receiver according to claim 14, characterised in that each phase shifter circuit associated with the stray capacitance (C13, C23) of the multiplexing means is assimilated in an equivalent circuit comprising an equivalent resistance (Req1, Req2) and an equivalent capacitance (Ceq1, Ceq2) in parallel, said correction means comprising a correction resistance (Rcor) allowing said equivalent resistances of said equivalent circuits to be balanced.
16. Portable receiver according to claim 15, characterised in that the correction means comprise furthermore a correction capacitor (Ccor) allowing said equivalent capacitances of said equivalent circuits to be balanced.
17. Portable receiver according to claim 14, characterised in that said first and second phase shifter circuits are provided with correction means, and in that said correction means of the first phase shifter circuit comprise a first correction resistance (Rcor1) connected between the output of the antenna connected to said first phase shifter circuit and the ground, and in that said correction means of the second phase shifter circuit comprise a second correction resistance (Rcor2) connected between the output of the antenna connected to said second phase shifter circuit and the ground, said first and second correction resistances being given by the formula Rcor(Rant*Req)(ReqRant), where Rant is the tuning resistance of the corresponding antenna and Req is the equivalent resistance of the corresponding phase shifter circuit and of the multiplexing means, Req being greater than or equal to Rant.
18. Portable receiver according to claim 17, characterised in that said correction means of said first and second phase shifter circuits comprise furthermore respectively, in parallel with said first and second correction resistance, first (Ccor1) and second (Ccor2) correction capacitors having a respective capacitance, said capacitances of the correction capacitors being given by the following formula CcorCantCeq, where Cant is the tuning capacity of the corresponding antenna and Ceq is the equivalent capacitance of the corresponding phase shifter circuit and of the multiplexing means, Cant being greater than or equal to Ceq.
19. Portable receiver according to claim 14, characterised in that it comprises furthermore linearisation means (R1in1, R1in2, C1in1 and C1in2) of the multiplexing means.
20. Portable electronic device forming part of an anti-theft system for automotive vehicles, characterised in that it comprises a receiver according to claim 14.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A crosslinked fluoropolymer network made by the process comprising:
A) providing a diacrylate copolymer of formula CH2\u2550CR\u2032COO\u2014(CH2)n\u2014R \u2014(CH2)n\u2014OOCCR\u2032\u2550CH2, wherein R\u2032 is H or \u2014CH3, n is 2 or 3 and R is an oligomer having a number average molecular weight of 1000 to 25,000 daltons, said oligomer selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin;
B) mixing said diacrylate copolymer with a source of free radicals selected from the group consisting of photoinitiators and organic peroxides to form a curable composition; and
C) generating free radicals to form a crosslinked fluoropolymer network.
2. A crosslinked fluoropolymer network of claim 1 wherein said oligomer has a number average molecular weight of 1200 to 12,000 daltons.
3. A crosslinked fluoropolymer network of claim 2 wherein said oligomer has a number average molecular weight of 1500 to 5000 daltons.
4. A crosslinked fluoropolymer network of claim 1 wherein said oligomer comprises copolymerized units selected from the group consisting of i) vinylidene fluoride, tetrafluoroethylene and perfluoro(methyl vinyl ether); ii) tetrafluoroethylene, perfluoro(methyl vinyl ether) and ethylene; iii) vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene; and iv) tetrafluoroethylene, vinylidene fluoride and propylene.