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Copyright 1997-2002 RF Micro Devices, Inc.
Introduction
This application note provides information on the evaluation board assembly supplied by RFMD. This information covers
NBB Series HBT Broadband Feedback Amplifiers and NDA Series HBT Distributed Amplifiers.
The evaluation board assembly provided by RFMD is intended for customers to evaluate our product using a network
analyzer.
NBB Series HBT Broadband Feedback Amplifiers
1. What is provided with the evaluation board assembly?
a. An NBB part mounted on a PCB with connectors.
b. S-parameter data (provided with all evaluation boards).
Note: The s-parameter data gain results include device performance as well as evaluation board and connector
loss variations. The insertion losses of the evaluation board and connectors are as follows.
1. 1GHz to 4GHz=-0.06dB
2. 5GHz to 9GHz=-0.22dB
3. 10GHz to 14GHz=-0.50dB
4. 15GHz to 20GHz=-1.08dB
2. Bill of Materials for NBB Series evaluation board assembly:
a. NBB series component.
b. Two (2) SMA connectors.
c. One (1) PC board material, Rogers Corp. part number: TMM-6, 20mil thick or equivalent.
d. 60/40 tin-lead solder.
3. Figure of Evaluation Board with external biasing
Note: Biasing components are not supplied with evaluation board assembly.
RFMD
DUT
INPUT
OUTPUT
SMA
Connector (2)
PC Board (1)
V
C
Figure 1. NBB-Series Evaluation Board
RFMD
DUT
INPUT
OUTPUT
V
C
C Block
L Choke
R
CC
120
Ω
V
CC
Output
C Block
Input
Figure 2. NBB-Series Evaluation Board with External Biasing
Evaluation Board Assembly Biasing Configuration
AN0010
AN0010
Evaluation Board Assembly Biasing Configuration
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