Device comprising two mutually adapted impedances for the purpose of power transmission
A device ( 1 ) for processing a signal (S) has firstly an antenna configuration ( 5 ) that is arranged to transmit a signal (S), that has at least one antenna-configuration terminal ( 6, 7 ) intended for connecting the antenna configuration ( 5 ) to a circuit ( 2 ), and that has an antenna-configuration impedance (ZA) at the antenna-configuration terminal ( 6, 7 ), and the circuit ( 2 ) further has at least one circuit terminal ( 3, 4 ) at which the circuit ( 2 ) has a circuit impedance (ZS) and at which the circuit ( 2 ) is connected to the antenna-configuration terminal ( 6, 7 ) for the purpose of power transmission between the antenna configuration ( 5 ) and the circuit ( 2 ) by using the signal (S), at least one of the two impedances (ZA, ZS) having, in respect of its reactance (YA, YS), a difference in reactance value (ΔY) from a nominal reactance value (Y NOM ) that is adapted for the transmission of power between the antenna configuration ( 5 ) and the circuit ( 2 ), and one of the two impedances (ZA, ZS) having a resistance (XA, XS) whose value (X) is greater than a nominal resistance value (X NOM ) that is adapted for the transmission of power between the antenna configuration ( 5 ) and the circuit ( 2 ) and is smaller than a maximum resistance value (X MAX ) that is a function of the difference in the reactance value (ΔY).
1. A device for processing a signal, the device comprising:
an antenna configuration; and
a circuit;
wherein the antenna configuration is arranged to transmit a signal, the antenna configuration having at least one antenna-configuration terminal that is intended for connecting the antenna configuration to the circuit and the antenna configuration having an antenna-configuration impedance (ZA) at the antenna-configuration terminal;
wherein the circuit has at least one circuit terminal at which the circuit has a circuit impedance (ZS) and at which the circuit is connected to the antenna-configuration terminal for the purpose of power transmission between the antenna configuration and the circuit by using the signal,
wherein at least one of the two impedances (ZA, ZS) has, in respect of its reactance(YA, YS), a difference in reactance value (ΔY) from a nominal reactance value (Y NOM ) that is adapted for the transmission of power between the antenna configuration and the circuit,
characterized in that one of the two impedances (ZA, ZS) has a resistance (XA, XS) whose value is greater than a nominal resistance value (X NOM ) that is adapted from the transmission of power between the antenna configuration and the circuit and is smaller than a maximum resistance value (X MAX ) that is a function of the difference in the reactance value (ΔY).
2. A device as claimed in claim 1 , characterized in that the functional dependence that the maximum resistance value shows on the difference in reactance value is given by the formula:
X MAX (Δ Y )=(Δ Y 2 /X NOM )+ X NOM
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
3. A device as claimed in claim 1 , characterized in that the resistance whose resistance value is greater than the nominal resistance value that is adapted for the transmission of power between the antenna configuration and the circuit and is smaller than the maximum resistance value that is a function of the difference in reactance value is an optimum resistance value given by the formula:
X OPT (Δ Y )√{square root over ( X NOM 2 +ΔY 2 )}
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
4. A device as claimed in claim 1 , characterized in that the quality of the two impedances has a value that is greater than two.
5. A device as claimed in claim 1 , characterized in that the antenna-configuration impedance has a resistance whose value is greater than the nominal resistance value that is adapted for the transmission of power between the antenna configuration and the circuit and is smaller than the maximum resistance value that is a function of the difference in reactance value.
6. An antenna configuration for a device for processing a signal, which antenna configuration is arranged to transmit a signal,the antenna configuration comprising:
at least one antenna-congiuration terminal that is intended for connection to a circuit of the device, the circuit having at least one circuit terminal at which the circuit has a circuit impedance (ZS) and at which the circuit is connectable to the antenna-configuration terminal for the purpose of power transmission between the antenna configuration and the circuit by using the signal,
wherein the antenna configuration has an antenna-configuration impedance (ZA) at the antenna-configuration terminal, wherein at least one of the two impedances (ZA, ZS) has, in respect of its reactance (YA, YS), a difference in reactance value (ΔY) from a nominal reactance value (Y NOM ) that is adapted for the transmission of power between the antenna configuration and the circuit,
characterized in that the impedance (ZA) of the antenna configuration has a resistance (XA) whose value is greater than a nominal resistance value (X NOM ) that is adapted from the transmission of power between the antenna configuration and the circuit and is smaller than a maximum resistance value (X MAX )that is a function of the difference in reactance values(ΔY).
7. An antenna configuration as claimed in claim 6 , characterized in that the functional dependence that the maximum resistance value shows on the difference in reactance value is given by the formula:
X MAX (Δ Y )=(Δ Y 2 /X NOM
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
8. An antenna configuration as claimed in claim 6 , characterized in that the resistance whose resistance value is greater than the nominal resistance value that is adapted for the transmission of power between the antenna configuration and the circuit and is smaller than the maximum resistance value that is a function of the difference in reactance value, is an optimum resistance value given by the formula:
X OPT (Δ Y )√{square root over ( X NOM 2 +ΔY 2 )}
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
9. An antenna configuration as claimed in claim 6 , characterized in that the quality of the antenna-configuration impedance has a value that is greater than two.
10. A circuit for a device for processing a signal, the circuit comprising:
at least one circuit terminal at which the circuit has a circuit impedance (ZS) and at which the circuit is connectable to an antenna-configuration terminal for the purpose of power transmission between an antenna configuration and the circuit by using the signal, which antenna configuration is arranged for the transmission of the signal which antenna configuration has at least one antenna-configuration terminal that is intended for connecting the antenna configuration to the circuit, and which antenna configuration has an antenna-configuration impedance (ZA) at the antenna-configuration terminal, wherein at least one of the two impedances (ZA, ZS) has, in respect of its reactance (YA, YZ), a difference in reactance value (ΔY) from a nominal reactance value (Y NOM ) that is adapted for the transmission of power between the antenna configurations and the circuit,
characterized in that the impedance of the circuit (ZS) has a resistance (XS) whose value is greater than a nominal resistance value (X NOM ) that is adapted from the transmission of power between the antenna configuration and the circuit and is smaller than a maximum resistance value (X MAX ) that is a function of the difference in the reactance value (ΔY).
11. A circuit as claimed in claim 10 ,characterized in that the functional dependence that the maximum resistance value shows on the difference in reactance value is given by the formula:
X MAX (Δ Y )=(Δ Y 2 /X NOM )+X NOM
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
12. A circuit as claimed in claim 10 , characterized in that the resistance whose resistance value is greater than the nominal resistance value that is adapted for the transmission of power between the antenna configuration and the circuit and is smaller than the maximum resistance value that is a function of the difference in reactance value, is an optimum resistance value given by the formula:
X OPT (Δ Y )√{square root over ( X NOM 2 +ΔY 2 )}
where ΔY is the difference in reactance value and X NOM is the nominal resistance value.
13. A circuit as claimed in claim 10 , characterized in that the quality of the circuit impedance has a value that is greater than two.