Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model RFP
-
155
7
-
XX
-
XX
Features:
• 100 Watts
• Lowest Cost
• True Surface Mount
• Xinger Circulator Matched
• Alumina Ceramic
• Non-Nichrome Resistive
Element
• Low VSWR
• 100% Tested
100 Watts
Description
The RFP-1557-XX-XX family of surface mount attenuators consists of
three parts matched to the complex impedance of each of the five high
power Xinger circulators. With each attenuator matched to the circulator’s
complex impedance, the pair will provide superior performance and a true
pick and place solution. The SMD attenuators are available for AMPS,
GSM, DCS, PCS and UMTS frequency bands, and they can be used in
many applications, not only as the load on the Xinger circulator. Other
typical applications include the coupled port of the directional couplers.
General Specifications
Resistive Element Thick film
Substrate Alumina
Terminal Finish Thick film Silver
Operating Temperature -55 to +125°C (see chart)
Tolerance is ±0.010”, unless otherwise specified. Designed to meet of exceed
applicable portions of MIL-E-5400. All dimensions in inches.
Electrical Specifications
Attenuation Value: 20, 30 dB ± 2dB
Power: 100 Watts
Frequency Range: 869-960, 1805-1990, 2110-2170 MHz
V.S.W.R.: <1.20:1
Specification based on unit properly installed using suggested mounting instructions
and a 50 ohm nominal impedance. Specifications subject to change without notice
Outline Drawing
1557-XX-XXX
RFP
1557-XX-XXX
RFP
0.060 [1.52]
0.063 [1.61] (2X)
Ø0.474 [Ø12.03]
0.500 [12.70]0.500 [12.70]
0.500 [12.70]0.500 [12.70]
0.035 [0.90]
0.233 [5.91]
0.135 [3.43]0.135 [3.43]
0.033 [0.84]
0.060 [1.53] (2X)
0.182 [4.64] 0.100 [2.54]
0.060 [1.52]
0.047 [1.21]
Ø0.118 [Ø3.00]
(2X) 0.040 [1.02]
0.200 [5.08]
0.232 [5.91]
Dimensions given in inches [millimeters]
Rev. 10/31/03
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
Model RFP
-
155
7
-
XX
-
XX
Specifications:
PART NUMBER FREQUENCY (MHz) ATTENUATION (dB) TOL. (+/-dB) VSWR MATCHED
CIRCULATOR
RFP-1557-9-20 869-960 20 1.0 1.20:1 X800x-100
X900x-100
RFP-1557-19-20 1805-1990 20 1.0 1.20:1 X180x-100
X190x-100
RFP-1557-21-20 2110-2170 20 1.0 1.20:1 X210x-100
RFP-1557-9-30 869-960 30 1.5 1.20:1 X800x-100
X900x-100
RFP-1557-19-30 1805-1990 30 1.5 1.20:1 X180x-100
X190x-100
RFP-1557-21-30 2110-2170 30 1.5 1.20:1 X210x-100
Note: X800x-100, where x refers to the circulator direction of rotation: L for clockwise or R for counter
clockwise rotation, i.e. X800R-100.
Power De-rating: Tape & Reel:
INPUT PAD
.453 [11.51]
.069 [1.75]
DIMENSION IN INCHES [MILLIMETERS]
.012 [0.30]
.062 [1.58]
.106 [2.69]
DESPOOLING DIRECTION
.945 [24.01]
.535 [13.60]
RFP
.079 [2.01]
.164 [4.18] Ø.059 [Ø1.50]
.535 [13.60]
PART NUMBER
.945 [24.01]
Mounting Footprint and Procedure:
Dimension given in inches [millimeters]
For best thermal performance the PCB should be soldered to
the heat sink.
RFP
1557-XX-XX
50 ohm line 0.155 [3.93]
0.082 [2.08]
Ø0.019 [Ø0.48]
0.024 [0.62]
0.273 [6.93]
0.036 [0.92]
0.036 [0.92]
0.061 [1.54]
0.024 [0.62]
0.018 [0.46]
0.018 [0.46] 50 ohm line
Ø0.061 [Ø1.56]
2x 4-40 Screw Hole
1. Drill thermal vias through PCB and fill with solder, such as SN63 type.
2. Solder part in place using SN63 type solder with controlled temperature iron (700°C).
3. To ensure good thermal connectivity to heat sink, which is critical for proper operation, drill and tap
heatsink and mount PCB board to heatsink using screws.
MOUNTING PROCEDURE