Measuring An Unbalanced And Balanced Bandpass Filter; Evaluation Steps - Agilent Technologies ENA Series User Manual

Measuring an Unbalanced and Balanced Bandpass Filter

This section introduces an example of actually evaluating the unbalanced and balanced
SAW bandpass filter with a center frequency of 942.5 MHz. Figure 15-25 shows the
measurement circuit in the condition for evaluating a DUT.
Figure 15-25 Measurement circuit

Evaluation Steps

Here, the DUT is evaluated by following the steps described in Table 15-6.
Table 15-6 Evaluating the Deviation from a Linear Phase
Step
"1. Connecting the DUT" on page 510
"2. Setting the Measurement Conditions" on
page 511
"3. Performing Calibration" on page 512
"4. Setting a Balance Conversion Topology" on
page 513
"5. Selecting Measurement Parameters" on page 513
"6. Extending the Calibration Plane (removing the
cause of error)" on page 515
"7. Setting the Port Reference Impedances" on
page 515
"8. Adding a Matching Circuit" on page 517
Chapter 15
Measuring an Unbalanced and Balanced Bandpass Filter
Description
The DUT is connected.
The measurement conditions are defined.
The full 3-port calibration is executed.
The balance conversion topology is specified.
The mixed-mode S-parameters are selected.
The calibration reference plane is extended.
The port reference impedances are specified.
A matching circuit is added.
Measurement Examples
509