4.7 Video Tutorials
199
4.10
Two-port
networks. Comparison of different topologies of matching networks
including:
--return loss (S
11
) vs frequency and its skew
--insertion loss (S
21
) vs frequency, low and high pass responses.
3dB-bandwidth
and Q. Difference between loaded and unloaded Q. Comparison
of simulated results and algebraic calculations.
Tips on how to use matching networks to the designer's advantage based on
target application.
4.11
Designing matching networks with specific Q. Three-element matching, T-
networks. Lines of constant Q on Smith chart.
Frequency response of T-matching network and verification that unloaded and
loaded Q match the design specifications. Comparison of frequency response of T
and L-matching networks.
4.12
Designing matching networks with specific Q. Three-element matching, Pi-
networks.
Design of pi-match and L-match with I-Match. Exporting (from I-Match) designs to
schematic and frequency responses to graphs. Merging plots on one graph to
compare frequency responses.
4.13
Matching any two complex terminations on the chart. Reiteration of
complex
conjugate match. Connection between algebraic representation of impedances
and admittances and their circuital implementation.
Port with complex impedance: Mathematical form and physical implementation.
Use of transmission line segments with caps or inductors in shunt to achieve
match.
4.14
Transmission line matching. Open and short circuited transmission line stubs.
Comparison between capacitors and open-circuited transmission line stubs.
Comparison between inductors and short-circuited transmission line stubs.
Demonstration of the fact that stubs of any type can behave as both inductors
and capacitors depending on electrical length. Clear demarcation of electrical
length boundaries.
Matching networks comprising exclusively of distributed transmission line
elements. Using I-Match for distributed matching. Comparison of various types of
matching networks (for identical terminations), in terms of insertion loss, return
loss and frequency profiles, using I-Match.
Conquer Radio Frequency
199 www.cadence.com/go/awr
