Broadband channel improvement network
A wireless communication device can include a channel matching network. The channel matching network includes a pair of coupled lines coupled to the input port, and a capacitive element coupled between the pair of coupled lines and an antenna load.
1 . A channel matching network comprising:
an antenna having an input port and a pair of coupled transmission lines coupled to the input port;
a grounded capacitive element coupled between one of the pair of coupled transmission lines and an antenna load; and
an asymmetrical attenuator coupled between the grounded capacitive element and the antenna load.
2 . The channel matching network of claim 1 , wherein the attenuator has attenuation values and resistance values that depend on at least one of a reflection coefficient (S 11 ) of the antenna and a forward transmission (S 21 ) of the antenna.
3 . The channel matching network of claim 1 , wherein the attenuator has attenuation values and resistance values that depend on at least one of a reflection coefficient (S 11 ) and a forward transmission (S 21 ) of a channel over which the antenna is to communicate.
4 . The channel matching network of claim 1 , wherein the pair of coupled transmission lines has a characteristic impedance based on a frequency band of operation of the channel matching network.
5 . The channel matching network of claim 1 , wherein the pair of coupled transmission lines has a characteristic impedance based on at least one of a reflection coefficient (S 11 ) of the antenna and a forward transmission (S 21 ) of the antenna.
6 . The channel matching network of claim 1 , wherein the pair of coupled transmission lines has a length based on a frequency band of operation of the channel matching network.
7 . The channel matching network of claim 1 , wherein the pair of coupled transmission lines has a length based on at least one of a reflection coefficient (S 11 ) of the antenna and a forward transmission (S 21 ) of the antenna.
8 . A wireless communication device comprising:
at least two antennas, at least one of the at least two antennas including an input port having coupled thereto a pair of coupled transmission lines, and a grounded capacitive element coupled between one of the pair of coupled transmission lines and an antenna load of the at least two antennas;
measurement circuitry coupled to the at least two antennas and configured to detect S- parameters of the at least two antennas; and
an asymmetrical attenuator coupled between the grounded capacitive element and the antenna load.
9 . The wireless communication device of claim 8 , wherein the attenuator has attenuation values and resistance values that depend on at least one of a reflection coefficient (S 11 ) of the respective antenna, and a forward transmission (S 21 ) of the respective antenna.
10 . The wireless communication device of claim 8 , wherein the attenuator has attenuation values that depend on at least one of a reflection coefficient (S 11 ) and a forward transmission (S 21 ) of the respective antenna.
11 . The wireless communication device of claim 8 , wherein each of the pairs of coupled transmission lines has a characteristic impedance based on a frequency band of operation of a channel over which the antenna is to transmit.
12 . The wireless communication device of claim 8 , wherein the pair of coupled transmission lines has a length based on a frequency band of operation of a channel over which the antenna is to transmit.
13 . A method for communicating in a mm Wave network, the method comprising:
providing a transmit antenna to communicate over a channel;
providing a pair of coupled transmission lines at the transmit antenna;
providing a grounded capacitive element between one of the pair of coupled transmission lines and an antenna load of the transmit antenna;
setting a characteristic impedance and length of the pair of coupled transmission lines based on a frequency band of operation of the channel;
transmitting a signal from the transmit antenna on the frequency band;
providing an attenuator coupled between the grounded capacitive element and the antenna load of the transmit antenna; and
setting attenuation values of first attenuator based on at least one of a reflection coefficient (S 11 ) of the transmit antenna, and a forward transmission (S 21 ) of the transmit antenna.
14 . The method of claim 13 , further comprising:
setting resistance values of the first attenuator based on at least one of a reflection coefficient (S 11 ) and a forward transmission (S 21 ) of the channel.
15 . The method of claim 13 , further comprising:
setting a characteristic impedance of each of the pair of coupled transmission lines based on a frequency band of operation of the channel.