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参数资料
| 型号： | HSMS-2863-TR2 |
| 厂商： | AGILENT TECHNOLOGIES INC |
| 元件分类： | 参考电压二极管 |
| 英文描述： | SILICON, UHF-C BAND, MIXER DIODE |
| 封装： | SOT-23, 3 PIN |
| 文件页数： | 16/17页 |
| 文件大小： | 205K |
| 代理商： | HSMS-2863-TR2 |
8
915 MHz Detector Circuit
Figure 11 illustrates a simple
impedance matching network for
a 915 MHz detector.
65nH
100 pF
VIDEO
OUT
RF
INPUT
WIDTH = 0.050"
LENGTH = 0.065"
WIDTH = 0.015"
LENGTH = 0.600"
TRANSMISSION LINE
DIMENSIONS ARE FOR
MICROSTRIP ON
0.032" THICK FR-4.
Figure 11. 915 MHz Matching
Network for the HSMS-286x Series
at 3
A Bias.
A 65 nH inductor rotates the
impedance of the diode to a point
on the Smith Chart where a shunt
inductor can pull it up to the
center. The short length of 0.065"
wide microstrip line is used to
mount the lead of the diode’s
SOT-323 package. A shorted shunt
stub of length <
λ/4 provides the
necessary shunt inductance and
simultaneously provides the
return circuit for the current
generated in the diode. The
impedance of this circuit is given
in Figure 12.
FREQUENCY (GHz): 0.9-0.93
Figure 12. Input Impedance.
The input match, expressed in
terms of return loss, is given in
Figure 13.
RETURN
LOSS
(dB)
0.9
-20
FREQUENCY (GHz)
0.915
0
-10
-15
0.93
-5
Figure 13. Input Return Loss.
As can be seen, the band over
which a good match is achieved is
more than adequate for 915 MHz
RFID applications.
The HSMS-282x family is a better
choice for 915 MHz applications—
the foregoing discussion of a
design using the HSMS-286B is
offered only to illustrate a design
approach for technique.
100 pF
VIDEO
OUT
RF
INPUT
WIDTH = 0.017"
LENGTH = 0.436"
WIDTH = 0.078"
LENGTH = 0.165"
TRANSMISSION LINE
DIMENSIONS ARE FOR
MICROSTRIP ON
0.032" THICK FR-4.
Figure 14. 2.45 GHz Matching
Network.
0.030" PLATED THROUGH HOLE,
3 PLACES
0.094" THROUGH, 4 PLACES
FINISHED
BOARD
SIZE IS
1.00" X 1.00".
MATERIAL IS
1/32" FR-4
EPOXY/
FIBERGLASS,
1 OZ. COPPER
BOTH SIDES.
Figure 15. Physical Realization.
2.45 GHz Detector Circuit
At 2.45 GHz, the RF impedance is
closer to the line of constant
susceptance which passes
through the center of the chart,
resulting in a design which is
realized entirely in distributed
elements — see Figure 14.
In order to save cost (at the
expense of having a larger
circuit), an open circuit shunt
stub could be substituted for the
chip capacitor. On the other hand,
if space is at a premium, the long
series transmission line at the
input to the diode can be replaced
with a lumped inductor.
A possible physical realization of
such a network is shown in
Figure 15, a demo board is
available from Agilent.
CHIP CAPACITOR, 20 TO 100 pF
HSMS-2860
VIDEO OUT
RF IN
Figure 16. Test Detector.
相关PDF资料 |
PDF描述 |
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| HSS104TA-E | 0.11 A, SILICON, SIGNAL DIODE, DO-34 |
| HSS81TA-E | 0.15 A, SILICON, SIGNAL DIODE, DO-34 |
| HSS83TA | 0.15 A, SILICON, SIGNAL DIODE, DO-34 |
| HSS83TDX | 0.15 A, SILICON, SIGNAL DIODE, DO-34 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HSMS-2863-TR2G | 功能描述:射频检测器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 频率范围:650 MHz to 3 GHz 最大二极管电容: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SC-88 封装:Reel |
| HSMS-2864 | 制造商:AGILENT 制造商全称:AGILENT 功能描述:Surface Mount Microwave Schottky Detector Diodes |
| HSMS-2864-BLKG | 功能描述:射频检测器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 频率范围:650 MHz to 3 GHz 最大二极管电容: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SC-88 封装:Reel |
| HSMS-2864-TR1G | 功能描述:射频检测器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 频率范围:650 MHz to 3 GHz 最大二极管电容: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SC-88 封装:Reel |
| HSMS-2864-TR2G | 功能描述:射频检测器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 频率范围:650 MHz to 3 GHz 最大二极管电容: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SC-88 封装:Reel |
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