Agilent 86205A & 86207A
50 Ω& 75 ΩRF Bridges
Technical Data
300 kHz to 6 GHz (50 Ω)
300 kHz to 3 GHz (75 Ω)
40 dB directivity
Excellent directivity allows you to measure high return
loss devices and good port match lets you measure low
return loss devices. This is especially important when
making reflection measurements with scalar network
analyzers,
vector network analyzers and spectrum analyzers.
Wide frequency range
The bridges have an exceptionally wide RF frequency
range: 300 kHz to 6 GHz for the 50 Ω86205A and 300
kHz to 3 GHz for the 75 Ω86207A. They are ideal acces-
sories when used with the 8753 family of RF vector net-
work
analyzers.
Low insertion loss
These bridges offer low insertion loss, (nominally 1.5 dB),
which is significantly less than the typical 6 to 8 dB nor-
mally associated with RF bridges. Low insertion loss
means more power to the device under test. This is
required for the measurement of high-power solid state
amplifiers and traveling wave tube amplifiers.
Flat coupling factor
The frequency response of the coupled arm for these
bridges is very flat, within ±0.2 dB of the nominal
value of 16 dB. This is important in applications such as
external power leveling where a power meter or diode
detector is used to remotely level the output power from
an RF source and when measuring power level dependent
devices such as the LO input to a mixer or the RF input
to an amplifier during compression testing.
The 86205A/86207A high directivity RF bridges offer unparal-
leled performance in a variety of general purpose applica-
tions. They are ideal for accurate reflection measurements
and signal-leveling applications. They combine the directivity
and broad-band frequency range of directional bridges and
the low insertion loss and flat coupling factor of directional
couplers.
Specifications
Specifications describe the instrument’s warranted per-
formance over the temperature range of 0 °C to 55 °C.
Supplemental characteristics are intended to provide
information useful in applying the instrument by giving
supplemental, but not warranted performance parame-
ters. These are denoted as “typical.”
86205A
Frequency range 300 kHz to 6 GHz
Impedance 50 Ohms (nominal)
Directivity (25 °C, ±5 °C) 30 dB, 0.3 MHz to 5 MHz
40 dB, 5 MHz to 2 GHz
30 dB, 2 GHz to 3 GHz
(typical) 20 dB, 3 GHz to 5 GHz
(typical) 16 dB, 5 GHz to 6 GHz
Port match 23 dB, 0.3 MHz to 2.0 GHz (1.15 SWR)
20 dB, 2.0 GHz to 3 GHz (1.22 SWR)
(typical) 18 dB, 3 GHz to 5 GHz (1.29 SWR)
(typical) 16 dB, 5 GHz to 6 GHz (1.38 SWR)
Supplemental characteristics
Insertion loss 1.5 dB, +0.1 dB/GHz
Insertion loss deviation ±0.2 dB
Coupling factor (< 3 GHz) 16.0 dB, +0.15 dB/GHz
(> 3 GHz) 16.5 dB, –0.20 dB/GHz
Coupling factor deviation (< 3 GHz) ±0.2 dB, (> 3 GHz) ±0.4 dB
Maximum input power 25 dBm
Maximum DC, volts
(through arm) 30 VDC
Maximum DC, volts
(coupled arm) 0 VDC
Maximum DC, amps
(through arm) 1 amp
Below 1 MHz directivity and port match will be slightly degraded
above 200 ma bias current.
Connectors Type-N (female)
Dimensions 160 W x 93 H x 23 mm D
(6.3 W x 3.7 H x 1 in D)
Weight Net 0.57 kg (1.3 lbs),
shipping 1.80 kg (4.0 lbs)
Models
86205A RF bridge (50 Ω)
86207A RF bridge (75 Ω)
806207A
Frequency range 300 kHz to 3 GHz
Impedance 75 Ohms (nominal)
Directivity (25 °C, ±5 °C) 30 dB, 0.3 MHz to 5 MHz
40 dB, 5 MHz to 1.3 GHz
35 dB, 1.3 GHz to 2 GHz
(typical) 30 dB, 2 GHz to 3 GHz
Port match 20 dB, 0.3 GHz to 1.3 GHz (1.22 SWR)
(typical) 18 dB, 1.3 GHz to 2 GHz (1.29 SWR)
(typical) 18 dB, 2 GHz to 3 GHz (1.29 SWR)
–10
dB
–60
–20
–30
–40
–50
0.3 MHz 10 MHz 100 MHz 1 GHz 6 GHz
Frequency
Directivity
–10
dB
–60
–20
–30
–40
–50
0.3 MHz 1 MHz 10 MHz 1 GHz 3 GHz
Frequency
100 MHz
Directivity
–1.1
dB
–2.5
–1.3
–1.5
–1.7
–1.9
0.3 MHz 3 GHz 6 GHz
Frequency
–2.1
–2.3
Insertion Loss
–15.6
dB
–17.0
–15.8
–16.0
–16.2
–16.4
0.3 MHz 3 GHz 6 GHz
Frequency
–16.6
–16.8
Coupling Factor
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© Agilent Technologies, Inc. 2005, 2001
Printed in USA, February 8, 2005
5091-3117E
