Features and Description
• Compact size
• Broadband up to 50 GHz
• Excellent performance
The Agilent Technologies 87300 series
of compact, broadband directional/
sampling and hybrid couplers are
well suited for signal monitoring or,
when combined with a coaxial detector, signal leveling. See page 2 for the
wide range of product offerings.
Product Applications
These compact, broadband directional
couplers are important components
for many microwave measurement
systems. Although most modern signal generators and sweepers supply
signals whose power levels are stable
with respect to frequency, variations
in signal level are introduced due
to the cable losses (which increase
with frequency) and the frequency
response of other components in the
signal path. Inserting a directional
coupler into the system with a suitable microwave detector to supply
feedback to the ALC circuit of a signal
generator or sweeper provides a
leveled signal at a particular point in
the system (Figure 1).
Agilent 8474B,C,E detectors offer
excellent broad-band frequency
response and low SWR for this application. Other applications include
power monitoring with an 848X
series power sensor connected to the
sampling port. Connect the sampled
signal port to a microwave counter
to monitor frequency or to a signal
analyzer for frequency spectrum
monitoring (Figure 2).
Agilent 87300B,C,D and 87301B,C,D,E
Directional Couplers
87310B Hybrid Coupler
Product Overview
2
Product Specifications
Model 87300B 87300C 87300D
Frequency range (GHz) 1 to 20 GHz 1 to 26.5 GHz 6 to 26.5 GHz
Nominal coupling and
variation with respect
to output (or coupling
factor over insertion loss) 10 ±0.5 dB 10 ±1 dB 10 ±0.5 dB
Frequency sensitivity ±0.35 dB, 1 to 20 GHz ±0.5 dB, 1 to 26.5 GHz ±0.3 dB
Directivity >16 dB >14 dB, 1 to 12.4 GHz >13 dB
>12 dB, 12.4 to 26.5 GHz
Maximum SWR 1.35 1.35, 1 to 12.4 GHz 1.40
1.50, 12.4 to 26.5 GHz
Insertion loss <1.5 dB <1.2 dB, 1 to 12.4 GHz < 1.3 dB
<1.7 dB, 12.4 to 26.5 GHz
Typical insertion loss 0.6+0.04f 0.6+0.04f .6 + 0.025f
(dB, f = freq. in GHz)
Power rating
Average 20 W 20 W 20 W
Peak 3 kW 3 kW 3 kW
Connectors SMA (f) 3.5 mm (f) 3.5 mm (f)
Weight in grams (oz) 74 (2.6) 60 (2.1) 31.2 (1.1)
Model 87301B 87301C 87301D 87301E
Frequency range (GHz) 10 to 46 GHz 10 to 50 GHz 1 to 40 GHz 2 to 50 GHz
Nominal coupling and
variation with respect
to output (or coupling
factor over insertion loss) 10 ±0.7 dB 10 ±0.7 dB 13 ±1 dB 10 ±1 dB
Frequency sensitivity ±0.3 dB ±0.5 dB ±1.2 dB, 1 to 40 GHz ±0.6 dB, 2 to 26.5 GHz
±0.8 dB, 2 to 50 GHz
Directivity >10 dB >10 dB >14 dB, 1 to 20 GHz >13 dB, 2 to 26.5 GHz
>10 dB, 20 to 40 GHz >10 dB, 26.5 to 50 GHz
Maximum SWR 1.80 1.80 1.5, 1 to 20 GHz 1.5, 2 to 26.5 GHz
1.7, 20 to 40 GHz 1.8, 26.5 to 50 GHz
Insertion loss <1.9 dB <1.9 dB <1.2 dB, 1 to 20 GHz <2 dB
<1.9 dB, 20 to 40 GHz
Typical insertion loss .8+0.022f .8+0.022f 0.4 + 0.035f 0.55 + 0.025f
Power rating
Average 20 W 20 W 20 W 20 W
Peak 3 kW 3 kW 3 kW 3 kW
Connectors 2.92 mm (f) 2.4 mm (f) 2.4 mm (f) or 2.4 mm (f)
2.92 mm (f) for Option 292
Weight in grams (oz) 28.4 (1) 28.4 (1) 37 (1.3) 34 (1.2)
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