Abstract:
An antenna device (2) is formed in such a manner that reception antennas (31-1) to (31-N Rx ) are arranged at regular intervals between two transmission antennas (24-1) and (24-2) adjacent to each other among transmission antennas (24-1) to (24-N Tx ), and a spacing between the transmission antenna (24-1) and the transmission antenna (24-2) has a width obtained by adding an integral multiple of a spacing d Rx between each two of the reception antennas (31-1) to (31-N Rx ) to a width obtained by dividing the spacing d Rx by the number N Tx of the transmission antennas (24-1) to (24-N Tx ).
Abstract:
A waveguide microstrip line converter (10) includes: a waveguide (14); a dielectric substrate (11); a ground conductor provided with a slot (15); a line conductor (13); and a conductor (41) located at a distance from the line conductor (13) and adjacent to the line conductor (13). The line conductor (13) includes a microstrip line (35), a conversion unit (31), a first impedance transforming unit (32), a second impedance transforming unit (34), and a third impedance transforming unit (33), the microstrip line (35) having a first line width, the conversion unit (31) being located immediately above the slot (15) and having a second line width larger than the first line width, the first impedance transforming unit (32), the second impedance transforming unit (34), and the third impedance transforming unit (33) extending in a first direction from the conversion unit (31) and having a role in impedance matching between the microstrip line (35) and the conversion unit (31). The conductor (41) is adjacent to at least part of the conversion unit (31) of the line conductor (13).
Abstract:
A feeder circuit includes: a first line (103) having first and second ends; a second line (104) having first and second ends; a third line (105) having first and second ends; a first combiner (101) connected to the second end of the first line (103) and the second end of the second line (104), and configured to combine signals output from the second end of the first line (103) and the second end of the second line (104); a first coupling portion (115) configured to electrically couple a portion of the first line and a portion of the third line to each other; and a second coupling portion (116) configured to electrically couple a portion of the second line (104) and a portion of the third line (105) to each other in a manner that allows a signal reaching the first combiner (101) from the first end of the third route line (105) through the first coupling portion (115) and a signal reaching the first combiner (101) from the first end of the third route line (105) through the second coupling portion (116), to be cancelled out.
Abstract:
A coupling slot 10 provided in a wide wall shared by a first rectangular waveguide 8 and a second rectangular waveguide 9 arranged by stacking is formed by directing a longitudinal direction of the coupling slot 10 to a tube axial direction, and a matching conductor 11 projecting to a waveguide near the coupling slot 10 is provided on one sidewall of the second rectangular waveguide 9. A process of providing the matching conductor 11 is easy, a structure that can be manufactured at low cost is obtained, and a power distribution ratio can be set at an arbitrary ratio.