harris / HFA3101
.PDF
HFA3101
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VCC 3V |
S11 LOG MAG |
LCH |
0.1 |
0dB |
5dB/DIV |
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2K |
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4V
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8 |
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7 |
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6 |
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5 |
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3V
Q1 Q2 |
Q3 Q4 |
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Q5 |
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Q6 |
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1 |
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3 |
4 |
100MHz |
1.1GHz |
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FIGURE 11. OUTPUT PORT S22 TEST SET UP |
FIGURE 12. LO PORT RETURN LOSS |
S11 LOG MAG |
S22 LOG MAG |
0dB |
0dB |
10dB/DIV |
5dB/DIV |
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10MHz |
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110MHz |
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100MHz |
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1.1GHz |
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FIGURE 13. RF PORT RETURN LOSS |
FIGURE 14. IF PORT RETURN LOSS, WITH MATCHING |
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NETWORK |
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RF = 901MHz - 25dBm |
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RF = 900MHz -25dBm |
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10dB/ |
LO = 825MHz -6dBm |
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10dB/ |
LO = 825MHz -6dBm |
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DIV |
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-17dBm |
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DIV |
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-26dBm |
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-36dBm |
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-53dBm |
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SPAN |
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-58dBm |
SPAN |
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40MHz |
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500MHz |
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64M |
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76MHz |
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88M |
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675 750 825 |
900 975 |
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11*LO - 10RF |
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IF |
12RF - 13LO |
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LO - 2RF |
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LO + 2RF |
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FIGURE 15. TYPICAL IN BAND OUTPUT SPECTRUM, VCC = 3V |
FIGURE 16. TYPICAL OUT OF BAND OUTPUT SPECTRUM |
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9-36
HFA3101
Design Example: Up Converter Mixer
Figure 17 shows an example of a up converter for cellular applications.
Conclusion
The HFA3101 offers the designer a number of choices and different applications as a powerful RF building block. Although isolation is degraded from the theoretical results for the cell due to the unbalanced, nondifferential input schemes being used, a number of advantages can be taken into consideration like cost, flexibility, low power and small outline when deciding for a design.
TABLE 5. TYPICAL PARAMETERS FOR AN UP CONVERTER EXAMPLE
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VCC = 3V |
VCC = 4V |
PARAMETER |
IBIAS = 8mA |
IBIAS = 18mA |
Power Gain, LO = -6dBm |
3dB |
5.5dBm |
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Power Gain, LO = 0dBm |
4dB |
7.2dB |
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RF Isolation, LO = 0dBm |
15dBc |
22dBc |
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LO Isolation, LO = 0dBm |
28dBc |
28dBc |
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LO IN
0.01
825MHz
VCC 
3V
0.01 
110
0.01 
330
0.01 
220
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VCC 3V |
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0.1 |
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390nH |
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0.01 |
5.2nH |
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51 |
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900MHz |
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11p |
8 |
7 |
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Q1 Q2 |
Q3 Q4 |
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Q5 |
Q6 |
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RF IN |
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0.01 |
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75MHz |
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REE |
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FIGURE 17.
OUTPUT WITHOUT EMITTER DEGENERATION OUTPUT WITH EMITTER DEGENERATION REE = 4.7Ω EXPANDED SPECTRUM REE = 4.7Ω
890 |
901 |
912 |
2LO - 10RF |
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12RF |
RF = 76MHz |
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LO = 825MHz |
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SPAN |
50MHz |
FIGURE 18. TYPICAL SPECTRUM PERFORMANCE
825 |
900 |
976 |
9-37