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Hybrid90 (Ideal 90-degree Hybrid Coupler)

Symbol

Available in ADS

Parameters

Name

Description

Units

Default

Loss

Insertion loss

dB

0

GainBal

Gain balance between output ports

dB

0

PhaseBal

Phase balance between output ports

deg

0

Rref

Port reference impedance

Ohm

50

Temp

Temperature

°C

None

CheckPassivity

Check passivity flag: if set to yes, a passivity check is performed and a warning is output if the device is not passive; if set to no, a passivity check is not performed.

None

yes

Delay

Time delay for output ports

sec

1.0e-16

Range of Usage

Loss ≥ 0 dB
Delay ≥ 1.0e-16 sec

Notes/Equations
  1. Although hybrid couplers are typically designed to give an equal power split between the coupled and the direct ports, the choice of coupling coefficients has been provided here for greater flexibility where a coupling of other than 3 dB is required.
  2. The loss term is applied to both the coupling and the direct transmission coefficients.
  3. Pin designations (directional coupler notation/0-90 notation):
    (IN) = input port #1
    (IS0) = isolated output/input port #2
    (0) = coupled output / in-phase output
    (−90) = direct output/90-degree phase output







  4. In general, Hybrid90 is not recommended for time-domain simulation. For the typical case of PhaseBal=0, time domain simulation will not produce proper results for S -90,IN , or S 0,ISO because ( )j in the frequency domain corresponds to a non-causal impulse response in time domain.
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