The DPF 2/6-150... is a 6-cavity high-power, base-station duplex filter
for the frequency band 138 - 175 MHz.
The duplexer is delivered in two basic models:
Model DPF 2/6-150 L can be tuned within the band 138 - 156 MHz and
model DPF 2/6-150 H within the band 152 - 175 MHz, both with a
nominal duplex separation of 4.5 MHz.
This filter type uses enlarged (40 x 40 mm), full quarter-wavelength
cavities with silver-plated, temperature compensated resonator
elements. The high Q’s obtainable in these cavities enable the filter to
work with very narrow duplex spacing while at the same time keeping
low insertion losses. Further, duplex isolation is improved at medium
spacings.
The enlarged dimensions also improve the power-handling capability of
the filter as insulation distances at high-voltage points are increased,
and the inevitable power dissipation (which always will be present
though insertion loss is kept to a minimum) will be distributed over a
larger area. The filter is capable of working continuously at a power
level of 150 W.
The DPF 2/6-150… is primarily intended for equipment, where the TX
and RX operate on single frequencies, but it can also, with slightly
reduced data, be used where the TX and RX operate on several
channels, i.e. within a certain port bandwidth. In the last case, factory-
tuning is recommended.
The housing is made of extruded aluminium, the chassis of passivated
steel, and the rigid coaxial cables and the connectors are provided with
teflon insulation.
The filter is coated with black vinyl to prevent corrosion.
ORDERING DESIGNATION
TYPE NO. PRODUCT NO. TUNING RANGE
(MHZ)
DUPLEX SPACING
(MHZ)
DPF 2/6-150L-1/2 200000204 138 - 156 1 - 2
DPF 2/6-150L-2/4 200000216 2 - 4
DPF 2/6-150L-4/6 200000209 4 - 6
DPF 2/6-150L-6/8 200001863 6 - 8
DPF 2/6-150L-8/10 200001864 8 - 10
DPF 2/6-150H-1/2 200000199 152 - 175 1 - 2
DPF 2/6-150H-2/4 200000198 2 - 4
DPF 2/6-150H-4/6 200001648 4 - 6
DPF 2/6-150H-6/8 200001649 6 - 8
DPF 2/6-150H-8/10 200000189 8 - 10
SPECIFICATIONS
ELECTRICAL
MODEL DPF 2/6-150...
TX/RX FREQUENCY DPF 2/6-150 L:
138 - 156 MHz
DPF 2/6-150 H:
152 - 175 MHz
MAX. INPUT POWER 150 W
INSERTION LOSS TX-ANT AND ANT-RX
(at 4.5 MHz duplex spacing)
Single-channel tuned
Multi-channel tuned, 1.5 MHz BW
≤ 1.2 dB (typ. 1.0 dB)
≤ 1.4 dB (typ. 1.2 dB)
TX NOISE SUPPRESSION ON RX-FREQUENCY
Single-channel tuned
Multi-channel tuned, 1.5 MHz BW
> 80 dB
> 60 dB
RX ISOLATION ON TX-FREQUENCY
Single-channel tuned
Multi-channel tuned, 1.5 MHz BW
> 80 dB
> 60 dB
DUPLEX SPACING 1 - 10 MHz
IMPEDANCE Nom. 50 Ω
SWR ≤ 1.5
MECHANICAL
TEMP. RANGE –30° C → +60° C
FREQ. STABILITY Approx. 4.5 ppm/° C
CONNECTORS N-female
DIMENSIONS (L x W x H) 540 x 250 x 50 mm
WEIGHT Approx. 4.5 kg
TYPICAL RESPONSE CURVES @ 1.6 MHz DUPLEX SPACING
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