One input to four output power divider

摘要

A one input to four output power divider is operable in a specified frequency band, and includes a first microstrip power divider, a first quarter-wavelength microstrip which has an end coupled electrically to one output terminal of the first microstrip power divider, a second microstrip power divider which has an input terminal coupled electrically to another end of the first quarter-wavelength microstrip, a second quarter-wavelength microstrip which has an end coupled electrically to the other output terminal of the first microstrip power divider, and a third microstrip power divider which has an input terminal coupled electrically to another end of the second quarter-wavelength microstrip.

主权项

1. A one input to four output power divider operable in a specified frequency band, and comprising:
a first microstrip power divider having an input terminal and two output terminals; a first quarter-wavelength microstrip which has a length corresponding to a quarter of a wavelength of a signal at a specified frequency within the specified frequency band, which has an end coupled electrically to one of said output terminals of said first microstrip power divider, and which has a characteristic impedance substantially equal to an output impedance of said first microstrip power divider at said one of said output terminals coupled to said first quarter-wavelength microstrip; a second microstrip power divider which has an input terminal and two output terminals, said input terminal of said second microstrip power divider being coupled electrically to another end of said first quarter-wavelength microstrip, said second microstrip power divider having an input impedance at said input terminal thereof substantially equal to the characteristic impedance of said first quarter-wavelength microstrip; a second quarter-wavelength microstrip which has a length corresponding to a quarter of the wavelength of the signal at the specified frequency, which has an end coupled electrically to the other one of said output terminals of said first microstrip power divider, and which has a characteristic impedance substantially equal to an output impedance of said first microstrip power divider at said other one of said output terminals coupled to said second quarter-wavelength microstrip; and a third microstrip power divider which has an input terminal and two output terminals, said input terminal of said third microstrip power divider being coupled electrically to another end of said second quarter-wavelength microstrip, said third microstrip power divider having an input impedance at said input terminal thereof substantially equal to the characteristic impedance of said second quarter-wavelength microstrip; wherein each of said first microstrip power divider, said second microstrip power divider and said third microstrip power divider includes:
a first microstrip connected to said respective input terminal,a second microstrip and a third microstrip connected in series between said respective input terminal and one of said respective output terminals,a fourth microstrip and a fifth microstrip connected in series between said respective input terminal and the other one of said respective output terminals, andan output resistor connected between a junction of said second and third microstrips and a junction of said fourth and fifth microstrips; wherein each of said first, third and fifth microstrips has a characteristic impedance of Z0, and each of said second and fourth microstrips has a characteristic impedance of √{square root over (2)} Z0; and wherein the output impedance of said first microstrip power divider at said one of said output terminals is substantially equal to the characteristic impedance of said third microstrip, the output impedance of said first microstrip power divider at said other one of said output terminals is substantially equal to the characteristic impedance of said fifth microstrip, and the input impedance of each of said first, second and third microstrip power dividers at said respective input terminal is substantially equal to the characteristic impedance of said first microstrip.