參數(shù)資料
型號(hào)： P13914EJ1V0AN00
英文描述： uPC8128TB. uPC8151TB. and uPC8152TB Low-Current Silicon MMIC Amplifiers for Cellular/Cordless Telephones
中文描述： uPC8128TB。 uPC8151TB。和uPC8152TB低電流硅單片放大器的蜂窩/無(wú)繩電話(huà)
文件頁(yè)數(shù)： 12/35頁(yè)
文件大?。?/td> 233K
代理商： P13914EJ1V0AN00
12
Application Note P13914EJ1V0AN00
4.
SAMPLE APPLICATION CHARACTERISTICS
4.1 Application Characteristics for Various Matching Methods
The ICs in this line-up were turned in a narrow band to a usage frequency within the recommended operating
frequency range (100 to 1900 MHz). This section introduces the results of evaluating the characteristics for each
matching method.
These evaluations where performed according to each of the three matching methods, namely output isolation
matching (matching for which isolation is best), output 50-
matching, and input/output 50-
matching, at
frequencies of 1.0, 1.66, and 1.9 GHz, using the
μ
PC8128TB. Table 4-1 shows the evaluation results and Figure 4-1
shows the measurement circuits.
The isolation and noise figure values were better for the output isolation matching method than for the other
matching methods. Since the output return loss and input return loss are improved for the output 50-
matching and
input/output 50-
matching methods, the power gain becomes 1 to 2 dB higher than for the output isolation matching
method. However, the isolation and noise figure results were worse. These evaluation results indicate that when
isolation and noise figure characteristics are emphasized, the output isolation matching method is optimum, but when
power gain is emphasized even if the isolation and noise figure are made somewhat worse, the methods that match
the output and input stages to 50
are optimum. The points at which isolation was best in these evaluation results
(output isolation matching) were obtained by setting the output return loss in the 10 to 20 dB range.
These evaluations were also performed for the
μ
PC8151TB using the same internal circuits as were used for the
μ
PC8128TB, and similar results were obtained.
Table 4-1. Measurement Results
Test Conditions: T
A
= +25
°
C, V
CC
= V
out
= 3.0 V, Z
L
= Z
S
= 50
1.0-GHz Tuning
Matching Method
Input Return Loss
S11 (dB)
Output Return Loss
S22 (dB)
Power Gain
S21 (dB)
Isolation
S12 (dB)
Noise Figure
NF (dB)
Output isolation
4.6
15.3
11.7
37.3
5.9
Output 50
4.6
35.1
12.0
36.7
6.0
Input/output 50
30.7
27.3
13.6
34.9
6.6
1.66-GHz Tuning
Matching Method
Input Return Loss
S11 (dB)
Output Return Loss
S22 (dB)
Power Gain
S21 (dB)
Isolation
S12 (dB)
Noise Figure
NF (dB)
Output isolation
5.8
16.6
11.0
41.2
5.9
Output 50
6.3
26.5
11.0
37.8
6.0
Input/output 50
30.8
27.6
12.1
35.2
6.7
1.9-GHz Tuning
Matching Method
Input Return Loss
S11 (dB)
Output Return Loss
S22 (dB)
Power Gain
S21 (dB)
Isolation
S12 (dB)
Noise Figure
NF (dB)
Output isolation
6.0
11.6
11.1
38.3
5.9
Output 50
6.3
33.1
11.9
36.2
6.0
Input/output 50
31.7
29.8
12.0
35.5
7.0
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