■PHASE SHIFTER
The PHASE SHIFTER changes the phase of the input signal and outputs it. There are various types according to the phase control system.
(1) Octave band method
This type is the lowest cost and most used. It is composed of 90deg hybrid and variable-capacitance diodes. The phase of the output signal can be continuously changed by the DC voltage control. The bandwidth is decided by the 90deg hybrid.
(2) Frequency conversion method
The input RF signal is converted into an intermediate frequency, and then, it is converted back into its former frequency. The phase of the output signal is changed by changing the phase of the local oscillation frequency signal used at this time. Even if the input frequency changes into this type, the amount of the phase change remains constant.
(3) PLL method (APC)
The output signal or external signal is compared in the phase with the input signal, and the phase of the output signal is changed depending on the amount of the delay in the feedback control loop. This type has the highest stability. It is possible to manufacture a phase shifter with a stability of less than ±0.1 degrees when used together with a homothermal box.
(4) IQ method
This type creates wideband with an IQ modulator, and the linearity is excellent.

・Can be designed to conform to specifications. (up to 3GHz)
・Phase stability of less than ±0.1 degrees is possible when used together with a homothermal box.
・Shape and size can be chosen in configurations such as NIM, JIS, EIA, rack, and small aluminum case.
・It can be used as a system or, built-in stand alone, of equipment.

Frequency range Individual frequency, Octave band,
Wideband by two or more octave band modules (up to 3GHz)
Input impedance 50Ω
Input level 0dBm
Input VSWR Less than 1.5
Input connector BNC,N,SMA etc.
Output impedance 50Ω
Output level 0dBm
Output connector BNC,N,SMA etc.
Transmission loss 0dB (Amplifier built-in type)
Frequency flatness Within ±1.0dB (Depending on band)
Sprious -15dB typ
Phase control type ①Octave band
②Frequency conversion
③PLL (APC)
④IQ
Control method DC voltage, Digital control, Adjustment by volume
Control resolution Continuous, Step
Variable amount More than 360°
Option Amplitude adjustment (Limitter etc.), Phase meter, External control, etc.
Power suplly DC power supply, AC100V
Shape NIM, JIS/EIA rack, aluminum case