Modular signal channeling system

Claim 1

A HIGH FREQUENCY TRANSMITTER AND RECEIVER SIGNAL CHANNELING SYSTEM COMPRISING: (A) A FIRST MODULE COMPRISING FIRST AND SECOND JUXTAPOSED ENERGY TRANSMISSION LINES HAVING ADJACENT FIRST ENDS AND ADJACENT SECOND ENDS, SAID LINES BEING COUPLED AT TWO SPACED POINTS INTERMEDIATE SAID ENDS BY RESPECTIVE FIRST AND SECOND DIRECTIONAL COUPLERS, EACH CONSTRUCTED TO DIVIDE INCIDENT WAVE ENERGY EQUALLY BETWEEN SAID LINES WITH A 90* PHASE DIFFERENCE, SAID FIRST AND SECOND LINES INCLUDING RESPECTIVE FIRST AND SECOND TUNED FILTERS DISPOSED IN CORRESPONDING POSITIONS IN SAID LINES BETWEEN SAID SPACED POINTS AND HAVING SUBSTANTIALLY IDENTICAL FREQUENCY BANDPASS CHARACTERISTICS, (B) A SECOND MODULE GEOMETRICALLY SIMILAR TO SAID FIRST MODULE AND COMPRISING THIRD AND FOURTH JUXTAPOSED ENERGY TRANSMISSION LINES SIMILAR TO SAID FIRST AND SECOND LINES AND INCLUDING THIRD AND FOURTH DIRECTIONAL COUPLERS SIMILAR TO SAID FIRST AND SECOND DIRECTIONAL COUPLERS AND THIRD AND FOURTH FILTERS SIMILAR TO SAID FIRST AND SECOND FILTERS, SAID THIRD AND FOURTH FILTERS HAVING SUBSTANTIALLY IDENTICAL FREQUENCY BANDPASS CHARACTERISTICS DIFFERENT FROM THOSE OF SAID FIRST AND SECOND FILTERS, (C) MEANS COUPLING THE FIRST END OF SAID SECOND LINE TO THE FIRST END OF SAID THIRD LINE, (D) A TRANSMITTING AND RECEIVING ANTENNA COUPLED TO THE FIRST END OF SAID FIRST LINE, (E) A TRANSMITTER ARRANGED TO SUPPLY A SIGNAL WHOSE FREQUENCY LIES SUBSTANTIALLY WITHIN THE PASSBAND OF SAID FIRST AND SECOND FILTERS, SAID TRANSMITTER CONNECTED TO THE SECOND END OF SAID SECOND LINE, (F) RECEIVER MEANS, INCLUDING A SIGNAL MIXER, ARRANGED TO RECEIVE A SIGNAL WHOSE FREQUENCY LIES SUBSTANTIALLY WITHIN THE PASSBAND OF SAID THIRD AND FOURTH FILTERS, SAID RECEIVER MEANS CONNECTED TO THE SECOND END OF SAID FOURTH LINE, AND (G) A LOCAL OSCILLATOR ARRANGED TO SUPPLY A SIGNAL WHOSE FREQUENCY IS DIFFERENT FROM THE FREQUENCIES OF THE SIGNAL TRANSMITTED AND THE SIGNAL RECEIVED, SAID OSCILLATOR CONNECTED TO THE SECOND END OF SAID THIRD LINE.