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Ideal Microwave >
Ideal Gain/Loss Model (GAIN)

Ideal Gain/Loss Model (GAIN)

Properties	Description	Units	Default	Range
GAIN	Gain or loss in dB (MS21)	None	Required	-INF,INF
LFC	Low frequency cutoff	Hz	0.	³ 0
LROF	Low frequency roll-off slope	None	0.	³ 0
HFC	High frequency cutoff	Hz	0.	³ 0
HROF	High frequency roll-off slope	None	0	³ 0
ISWR	Input VSWR	None	1.	³ 0
OSWR	Output VSWR	None	1.	³ 0
PI	Input reflection phase	deg	0.	-INF,INF
PO	Output reflection phase	deg	0.	-INF,INF
PG	Input to output phase delay (PS21)	deg	0	-INF,INF
RO	Reference characteristic impedance	Ohm	50.	³ 0
BEL	Band edge limit	None	-3.	-INF,INF
FMIN	Minimum noise figure in dB	None	0	-INF,INF
MGO	Magnitude of optimum noise figure reflection coefficient	None	0.	-INF,INF
PGO	Phase of optimum noise figure reflection coefficient	deg	0.	-INF,INF
RN	Noise equivalent resistance	Ohm	0	³ 0

Notes

1. This component may be used as an amplifier, a filter, or an attenuator.

2. The formulation is ideal with S12=0.

3. Frequency dependence may be intoduced into the parameters via the global parameter F (simulation frequency.) For example, setting:

GAIN=50-0.1*F/1GHz

defines a =0.1dB/GHz gain slope.

4. The GAIN element will give the noise properties if the noise parameters FMIN, MGO, PGO, and RN are specified. If noise parameters are not supplied, noise properties will be generated for passive data sets and will be set to zero for active data sets.

Netlist Form

GAIN:NAME n1 n2 GAIN=val [LFC=val] [LROF=val] [HFC=val] [HROF=val] [ISWR=val] [OSWR=val] [PI=val] [PO=val] [PG=val] [RO=val] [BEL=val] [FMIN=val] [MGO=val] [PGO=val] [RN=val]

Netlist Example

X1 1 2 GAINA

X2 1 2 GAINB

X3 1 2 GAINC

X4 1 2 GAIND

X5 1 2 GAINE

.subckt GAINA 1 2 ;*

GAIN:1 1 2 GAIN=5.5

.ends

.subckt GAINB 1 2 ;*

GAIN:2 1 2 GAIN=5.5 LFC=3GHZ HFC=25GHZ OSWR=1.2 LROF=2 HROF=4.3 RO=120

+ BEL=-3 MGO=0.52 PGO=-9.18 FMIN=1.2 RN=0.54

.ends

.subckt GAINC 1 2 ;*

GAIN:3 1 2 GAIN=0.5 LFC=3GHZ HFC=25GHZ OSWR=1.2 LROF=2 HROF=4.3 RO=120

+ BEL=-2

.ends

.subckt GAIND 1 2 ;*

GAIN:4 1 2 GAIN=0.5 LFC=3GHZ HFC=25GHZ OSWR=1.2 LROF=2 HROF=4.3 RO=50

+ BEL=-2

.ends

.subckt GAINE 1 2 ;*

GAIN:5 1 2 GAIN=-0.5 LFC=3GHZ HFC=25GHZ OSWR=1.2 LROF=2 HROF=4.3 RO=50

+ BEL=-2

.ends

.NWA F= LIN 0.5GHZ 20GHZ 0.5GHZ LIN 20GHZ 30GHZ 5GHZ

.end

References

HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程


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