Two-port network for signal transmission circuit

Claim 2

A two-port transmission network for operation over a band of frequencies, comprising, a. a first uniformly distributed RC network having a resistance per unit length R1 and a capacitance per unit length C1, b. a second uniformly distributed RC network having a resistance per unit length R2 and a capacitance per unit length C2, where R2/C2 R1/C1 resulting in the characteristic impedances of said first and second networks being equal, said second network having a length L2 greater than square root 10/2 pi fc R2 C2, where R2 and C2 are as defined above and fc is the lowest frequency of said frequency band, said second network having one end thereof connected to one end of said first network, c. an input terminal provided at another end of said first network, and d. an output terminal provided at a portion on said first RC network other than said another end, whereby a voltage characteristic of the network observed between said input terminal and output terminal, when expressed by decibels, is set to be proportional to the square root of the frequency of a signal applied to said input terminal.

Claim 3

A two-port transmission network as claimed in claim 1 wherein each of said first and second networks comprises a layer of conductive material, a layer of resistive material, and layer of dielectric material sandwiched between said layers of conductive and resistive layers.

Claim 4

A two-port transmission network as claimed in claim 1 wherein the resistance and capacitance per unit length of said first network are equal to the resistance and capacitance per unit length of said second network.

Claim 5

A dummy transmission line for operation over a band of frequencies comprising: a. a first uniformly distributed RC network having a resistance per unit length R1 and a capacitance per unit length C1, b. a second uniformly distributed RC network having a resistance per unit length R2 and a capacitance per unit length C2, where R2/C2 R1/C1 resulting in the characteristic impedances of said first and second networks being equal, said second network having a length L2 greater than Square Root 10/2 pi fc R2 C2, where R2 and C2 are as defined above and fc is the lowest frequency of said frequency band, said second network having one end thereof connected to one end of said first network, c. an input terminal provided at another end of said first network, d. an output terminal provided at a portion on said first RC network other than said another end, whereby a voltage characteristic of the network observed between said input terminal and output terminal, when expressed by decibels, is set to be proportional to the square root of the frequency oF a signal applied to said input terminal, and e. a low output impedance buffer amplifier connected to said input terminal and a high input impedance buffer amplifier connected to said output terminal, whereby the input signal of said transmission line is applied to the input of said low output impedance buffer amplifier and the output signal of said transmission line is delivered from the output of said high input impedance buffer amplifier.

Claim 6

A dummy transmission line for operation over a band of frequencies comprising: a. a first uniformly distributed RC network having a resistance per unit length R1 and a capacitance per unit length C1, b. a second uniformly distributed RC network having a resistance per unit length R2 and a capacitance per unit length C2, where R2/C2 R1/C1 resulting in the characteristic impedances of said first and second networks being equal, said second network having a length L2 greater than Square Root 10/2 pi fc R2 C2, where R2 and C2 are as defined above and fc is the lowest frequency of said frequency band, said second network having one end thereof connected to one end of said first network, c. an input terminal provided at another end of said first network, d. an output terminal provided at a portion on said first RC network other than said another end, whereby a voltage characteristic of the network observed between said input terminal and output terminal, when expressed by decibels, is set to be proportional to the square root of the frequency oF a signal applied to said input terminal, and e. a low output impedance buffer amplifier connected to said input terminal and a high input impedance buffer amplifier connected to said output terminal, whereby the input signal of said transmission line is applied to the input of said low output impedance buffer amplifier and the output signal of said transmission line is delivered from the output of said high input impedance buffer amplifier.