Three waveguide diplexer operating over two frequency ranges and including a three conductor transmission device coupled between the three waveguides of the diplexer

A method of operating a diplexer for an antenna, comprising:

• receiving, by a transmission device comprising at least three electric conductors, electromagnetic radiations in a first frequency range and with at least one type of polarization from a third waveguide of the diplexer, the at least three electric conductors comprising:
• a first electric conductor associated with a first end located within a first waveguide, and a second end located within the third waveguide,
• a second electric conductor associated with a first end located within the first waveguide, and a second end located within the third waveguide,
• a third electric conductor, wherein the first and second electric conductors are at least partially located within the third electric conductor, or the first and second electric conductors are at least partially located on the third electric conductor,
• transmitting, by the transmission device, the electromagnetic radiations in the first frequency range and with the at least one type of polarization to the first waveguide of the diplexer, the first waveguide transmitting the electromagnetic radiations to a dual band port of the diplexer, and
• transmitting electromagnetic radiations in a second frequency range, higher than the first frequency range, from a high band port of the diplexer to the dual band port of the diplexer, using a second waveguide of the diplexer,
• or
• receiving, by the transmission device comprising the at least three electric conductors, the electromagnetic radiations in the first frequency range and with the at least one type of polarization from the first waveguide of the diplexer,
• transmitting, by the transmission device, the electromagnetic radiations in the first frequency range and with the at least one type of polarization to the third waveguide of the diplexer, the third waveguide transmitting the electromagnetic radiations to a low band port of the diplexer, and
• transmitting the electromagnetic radiations in the second frequency range, higher than the first frequency range, from the dual band port of the diplexer to the high band port of the diplexer, using the second waveguide of the diplexer.

An antenna, comprising

• a diplexer comprising:
• a first waveguide configured to communicate electromagnetic radiations falling in a first frequency range, and
• a second waveguide located within the first waveguide, the second waveguide being configured to communicate electromagnetic radiations falling in a second frequency range, wherein the second frequency range is higher than the first frequency range,
• a third waveguide configured to communicate the electromagnetic radiations falling in the first frequency range,
• a transmission device comprising at least three electric conductors, the at least three electric conductors comprising:
• a first electric conductor associated with a first end located within the first waveguide, and a second end located within the third waveguide,
• a second electric conductor associated with a first end located within the first waveguide, and a second end located within the third waveguide,
• a third electric conductor, wherein the first and second electric conductors are at least partially located within the third electric conductor, or the first and second electric conductors are at least partially located on the third electric conductor,
• wherein at least one of (i) or (ii) is met:
• (i) the transmission device is operative to receive the electromagnetic radiations with at least one type of polarization and falling in the first frequency range from the third waveguide and to transmit the electromagnetic radiations with the at least one type of polarization and falling in the first frequency range to the first waveguide;
• (ii) the transmission device is operative to receive the electromagnetic radiations with the at least one type of polarization and falling in the first frequency range from the first waveguide and to transmit the electromagnetic radiations with the at least one type of polarization and falling in the first frequency range to the third waveguide, and
• a dish, configured to reflect at least the electromagnetic radiations falling in the first frequency range and the electromagnetic radiations falling in the second frequency range towards the diplexer or transmitted by the diplexer.