A transmission-type phase-shift attenuator has a poor reflection chara
cteristic at an output port. In this paper, to avoid such disadvantage
s, a reflection-type low-phase shift attenuator has been designed and
measured. As a result, at a center frequency (1855 MHz), the reflectio
n-type low-phase shift attenuator has an attenuation of 30 dB, within
the limit of 30 phase shift and less than -17-dB reflection characteri
stics at both input and output ports. It also demonstrates that the pe
rformance of the reflection-type low-phase-shift attenuator is better
than the transmission-type phase-shift attenuator with the same measur
ement specifications.