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   MS Radial Stub, Butterfly, Inner Radius Specified (MSRSTBR)        

MS Radial Stub, Butterfly, Inner Radius Specified (MSRSTBR)

 

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Properties

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Description

Units

Default

Range

A

Aperture angle

degree

Required

(0,180°)

RI

Inner radius

m

Required

> 0

RL

Outer radius

m

Required

> RI

W

Width of the feedline

m

Required

> 0

sub

Substrate name

none

Required

string

CoSimulator

Simulation engine

none

 

Planar EM

CoSimStackup

Stackup used for simulation

none

Layout Stackup

Layout Stackup, Footprint stackup, Substrate

 

Notes

1. The model is valid for H/lg << 1, where H is the substrate thickness defined in the correspond­ing .SUB statement, and lg is the wavelength in the substrate.

2. Inline configurations of the Radial Stub model include coupling to the main line. Implied MSTEEE, MSTEEC, or MSCROSS junctions are included in this model.

3. The stub is open at the outer radius RL.

4. Conductor and dielectric losses are included if the metallization or the surface resistivity are specified with the substrate data.

Netlist Form

MSRSTBR:NAME n1 n2 A=val RI=val RL=val W=val SUB=label

Netlist Example

MSRSTBR:RSTBR1 1 2 A=60.0 RI=0.393mm RL=4.4mm W=0.642mm SUB=SUB1

where sub1 needs to be defined in the corresponding .sub statement.

References

1. B. A. Syrett, “A Broad-Band Element for Microstrip Bias or Tuning Circuits,” IEEE Transac­tions on Microwave Theory and Techniques, Vol. MTT-28, No. 8, Aug. 1980, pp. 925-927.

2. F. Gianinni, R. Sorrentino, “Planar Circuit Analysis of Microstrip Radial Stubs,” IEEE MTT-32, No. 12, Dec. 1984, pp. 1652-1655.

3. F. Gianinni, “CAD-Oriented Lossy Models for Radial Stubs,” IEEE MTT-36, No. 2, Feb. 1988, pp. 305-313.



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