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Ground

symbolsResistorsInductors

Capacitors

Jumpers and

dots

Resistors, capacitors and inductors

MESFET MOSFETs

NMOS PMOS

BJT NPNBJT NPN

FETS and transistors

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Tee attenuator

Pi attenuator

Circulators and isolators

Attenuators, circulators and isolators

RF

LO

IF

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LO

IF

RF

Double-balanced mixers

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Variable

attenuator

Diodes

IFRF

LO

Mixer

Phase

shifter

Bias tee

RF only RF & DC

DC only

Inside only Inside/outsideOutside only

DC Blocks

Zener

Diodes, DC blocks, mixer, phase shifter/attenuator

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BPF

HPF

LPF

BSF

HP Pi

LP Tee

Lumped element filters

HP Tee

LP Pi

Filters

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SPSTSPDT SP3T

Switches

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Double box hybrid

Single box hybrid

isolated port

(port 4)

Z0

0.707 Z0

Z0

0.707 Z0Vin

(port 1)

0.707 Vin

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Equal-split rat race coupler

Unequal split rat race coupler

isolated port

PB

0, 3/4

0, /4 0, /4

0, /4

PIN

PA

1.414 0,

/4

0.707 Vin

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Wilkinson with input transformer (Z0=50)

100

/4

/4

59.4

59.4

Port 2

(50 )Port 1

(50 )

Port 3(50 )

/4

42

2 Z0,/4

2 Z0,/4

2Z0

Port 2

Port 1

Port 3

Basic 3 dB Wilkinson splitter

Two stage Wilkinson with input transformer

155.5 93.7

/4

/4

56.3

/4

56.3

/4

66.6

66.0

Port 2

(50 )Port 1

(50 )

Port 3(50 )

/4

39.8

Unequal split Wilkinson power divider

PB(port 3)

PIN(port 1)

RW

/4

/4

Z0D

/4

Z0C

/4

0

Z0

PA(port 2)

Wilkinson power splitters

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Port 3

R1

Port 2

Z1

Z1

Z2ZN-1

Z2

ZNRN-1

Port 1

N-section Wilkinson

R2

ZN

RN

ZN-1

0.5xR10.5xR20.5xRN-10.5xRN0 ohms

Port 2Z1Z2ZN-1

N-section Wilkinson - odd mode

ZN

Zin,odd

odd

2xZ0

Port 2

Z1Z2ZN-1

N-section Wilkinson - even mode

ZNZin,even

odd

N-section Wilkinson, Even/odd modes

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High-pass/low-pass

Switched filter - High-pass

SW1

SW2

C1L1L1

SW1

SW2

C1L1L1

Bypass state Hi-pass state

Q1

Q2

L1L1

L2

Q1 C1

Q2

L1L1

L2

Q1

Q2

L1L1

L2

C1

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Phase shifters

Shunt SPDT switch

/4

/4

Port 2

Port 1

Port 3

Series SPDT switch

Port 1

Port 2

Port 3

Series-shunt SPDT switch

Port 1

Port 2

Port 3

Port 1

Shunt-shunt SPDT

/4

/4

Port 2

Port 3

Series-shunt-shunt SPDT switch

/4

/4

Port 2

Port 1

Port 3

/4

/4

Switch configurations

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Port 4

Three-way Wilkinson splitter, star resistors

Three-way Wilkinson splitter, delta resistors

Port 4

3 Z0,/4

3 Z0,/4

3 Z0,/4

Z0

Z0

Z0

Port 2

Port 1 Port 3

3 Z0,/4

3 Z0,/4

3 Z0,/43Z0

3Z0

3Z0

Port 2

Port 1 Port 3

Three-way Wilkinsons

Port 2

Port 1

Port 3

Y-type 6 dB resistive splitter

Z0/3

Z0/3

Z0/3

Port 2

Port 1

Port 3

Delta-type 6 dB resistive splitter

Z0

Z0

Z0

Resistive splitters

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Z1

L-pad matching network (Z1>Z2)

Z2

R1

R2

L-Pad

R1

R3

R4

Z0

R2 Z0

Z0

Port 1

Port 2

Port 3

Owen resistive splitter

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Z4

R=Z0

R=Z0

Equal-split Gysel

Z2

isolated port

(port 5)

Z2 Z4

Z3

Vin

(port 1)

0.707 Vin

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+ -

Cell

+ -

Battery

-+-+

Multiple cells (as

in a flashlight)

+ -

+ -

Multiplebatteries (ganged

for more current)

+ -+ - + -

Multiple batteries (ganged for more voltage)

Meters, power supplies and batteries

Parallel

resonance

Seriesresonance

C RL

L C

R

Resonant circuits

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N-channel

G

G

D

S

MOSFETs and Drivers

Logic

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LNA

IFRF

LOIF amp

LO

Input

IF

output

RF

Input

Mixer

pad

Receivers

Microwave Capacitor model

C LS ESR

CP

Capacitor model

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General transmission line model

DC

Voltage

source

+

-

Current

source

C'

L' R'

G' C'

L'

Lossless transmission

line model

AC

Voltage

source

Voltage and current sources, transmission line model

VA1

VA

Three-terminal Ohmic switchCapacitive switch

VA2

Four-terminal Ohmic

switch

VA

MEMS switches

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Output

port

Input

port

Isolated

port

Balanced amp

Input

port

Coupled

port

Direct

port

Lange couplers. balanced amp

Z0

Carrier amplifier

Peaking amplifier

Z0

0.707 Z0

Input

port

Output

port

Doherty amp

Z0

0.707 Z0

Z0

0.707 Z0

Doherty amp

The FET images below came from James. Thanks!!

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Depletion mode MOSFET

Enhancement Mode MOSFET

p Channel JFET n-channel JFET

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