MRStub (Microstrip Radial Stub) SmartComponent
Symbol 
Parameters
| Name | Description | Unit | Default |
|---|---|---|---|
| Subst | Microstrip substrate name | Nonw | MSub1 |
| F | Design frequency | GHz | 1 |
| Xin | Desired input reactance | Ohm | 0 |
| Cin | Desired input capacitance | pF | 0 |
| Lin | Desired input inductance | nH | 0 |
| W | Width of feed line (set to zero if Z specified) | mil | 0 |
| Z | Characteristic impedance of feed line (set to zero if W specified) | Ohm | 50 |
| Angle | Subtended angle of circular sector | None | 60 |
| Delta | Length added to stub for tuning performance | mil | 0 |
| † Only one of Xin, Cin, and Lin can be non-zero | |||
Notes
- MRStub designs a microstrip radial stub given the substrate, desired input reactance, and stub dimensions.
- The stub is designed by dividing the radial line into several short segments.
- For proper operation, only one of Xin, Cin, and Lin can be non-zero. If all are zero, the stub is designed to provide an open circuit.
- Refer to the discussion of the MRSTUB component in the Microstrip Components documentation for a more detailed description of the model used for this component.
- The optimization changes the length of the stubs to achieve the desired input reactance.
- A SmartComponent subnetwork is empty until the Design Assistant is used to generate the design. Refer to Design Assistant.
Example
A MRStub component was used to design an open circuit stub at a center frequency of 1 GHz. Optimization yielded a value of Delta = -40.092 mil.
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