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Balanced Combiner

For larger more complex sites, Shively Labs balanced combiner modules allow any number of stations to be combined into a common antenna. Systems have been designed to handle up to 21 analog stations, along with their digital counterparts. Frequency spacings as close as 0.8 MHz are routine, even on large systems. Shively’s unique design allows stations to be added in any frequency order without the need to reconfigure the existing combiner chain – making them ideal for sites where future expansion is planned.

All Shively Labs combiners use bandpass filtering, ensuring higher spectral purity, flat in-band frequency response, and typical isolation values of 50 dB or higher – even for frequencies spaced 0.8 MHz apart. All Shively Labs bandpass filters are iris coupled, eliminating the need to adjust the passband to compensate for the increased distortion and asymmetry inherent to older, loop coupled designs.

Balanced combiners are generally used for combiner systems of four or more stations, for systems designed to feed two outputs, or for systems where an auxiliary wideband input is desired. Balanced combiner systems commonly require more floor space than a branched or starpoint system, and are usually more expensive. Balanced combiner modules are also used to expand branched combiner systems from their original configuration.

A balanced combiner system consists of station-specific modules along with shared “system components” used in the broadband signal line. Typical system components are interconnecting coax between station modules, output dual directional couplers to facilitate test measurements and monitoring, power splitters and patching networks to split combined output signals between antenna halves, and dummy loads for wideband inputs when not in use as antenna feeds. Lockout/Tagout switches may be either station specific or a shared system component.

A station-specific balanced combiner module (right) consists of input hybrid, two four cavity or resonator bandpass filters, and an output hybrid. In addition, a low-level group delay equalizer is used when a station’s signal is within 1.0 MHz of any other signal in the combiner system.

SKU: Balanced Combiner

Description

For larger more complex sites, Shively Labs balanced combiner modules allow any number of stations to be combined into a common antenna. Systems have been designed to handle up to 21 analog stations, along with their digital counterparts. Frequency spacings as close as 0.8 MHz are routine, even on large systems. Shively’s unique design allows stations to be added in any frequency order without the need to reconfigure the existing combiner chain – making them ideal for sites where future expansion is planned.

All Shively Labs combiners use bandpass filtering, ensuring higher spectral purity, flat in-band frequency response, and typical isolation values of 50 dB or higher – even for frequencies spaced 0.8 MHz apart. All Shively Labs bandpass filters are iris coupled, eliminating the need to adjust the passband to compensate for the increased distortion and asymmetry inherent to older, loop coupled designs.

Balanced combiners are generally used for combiner systems of four or more stations, for systems designed to feed two outputs, or for systems where an auxiliary wideband input is desired. Balanced combiner systems commonly require more floor space than a branched or starpoint system, and are usually more expensive. Balanced combiner modules are also used to expand branched combiner systems from their original configuration.

A balanced combiner system consists of station-specific modules along with shared “system components” used in the broadband signal line. Typical system components are interconnecting coax between station modules, output dual directional couplers to facilitate test measurements and monitoring, power splitters and patching networks to split combined output signals between antenna halves, and dummy loads for wideband inputs when not in use as antenna feeds. Lockout/Tagout switches may be either station specific or a shared system component.

A station-specific balanced combiner module (right) consists of input hybrid, two four cavity or resonator bandpass filters, and an output hybrid. In addition, a low-level group delay equalizer is used when a station’s signal is within 1.0 MHz of any other signal in the combiner system.

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Low Power Balance Combiner
Medium Power Balance Combiner
High Power Balanced Combiner

2940-04 & 2940-06 Balanced Combiner Specs

Performance Specifications
Type:Resonant Cavity
Size:4" Round6" Round
No. of Cavities per Filter3434
Typical VSWR
(deviation from
center frequency)

at ± 100 kHz:1.04:11.04:11.06:11.06:1
at ± 150 kHz:1.04:11.04:11.05:11.05:1
at ± 200 kHz:1.08:11.08:11.08:11.08:1
Typical Insertion Loss- 0.95 dB- 1.35 dB- .75 dB- 1.00 dB
Typical frequency response
(deviation from
center frequency)

at ± 100 kHz:-0.01 dB-0.05 dB-0.08 dB
at ± 150 kHz:-0.02 dB-0.15 dB-0.15 dB
at ± 200 kHz:-0.05 dB-0.20 dB-0.20 dB
Typical group delay
(deviation from
center frequency)

at ± 100 kHz:25 nsec25 nsec25 nsec25 nsec
at ± 150 kHz:50 nsec50 nsec50 nsec50 nsec
at ± 200 kHz:120 nsec120 nsec120 nsec120 nsec
Typical bandwidth± 200 kHz:± 200 kHz:± 200 kHz:± 200 kHz:
Spur rejection, ± 800 kHz or greater:Greater than 80 db

2940-04 & 2940-06 Balanced Combiner Weights, Inputs & Outputs

Inputs, Outputs and Weight2940-04 3 Pole2940-04 4 Pole2940-06 3 Pole2940-06 4 Pole
Input Connection:7-16 DIN Female7-16 DIN Female
Input Hybrid:Type N - 7-16 DINType N - 7-16 DIN
Output Connection:7-16 DIN Female7-16 DIN Female
Output Hybrid:Type N - 7-16 DINType N - 7-16 DIN
Maximum narrowband input power:1300 watts2500 watts
Maximum power through output hybrid:

Average2.5 kW2.5 kW
PeakTBDtbdtbdtbd
Shipping Weight:TBD lb (tbd kg) est.TBD lb (tbd kg) est.TBD lb (tbd kg) est.TBD lb (tbd kg) est.

2640-04-1/1 & 2640-04-1/3 Balanced Combiner Specs

Performance Specifications
Type:Interdigital
Size:4"
No. of Cavities per Filter3
Typical VSWR
(deviation from
center frequency)

at ± 100 kHz:1.04:1
at ± 150 kHz:1.04:1
at ± 200 kHz:1.06:1
Typical Insertion Loss- 0.30 dB
Typical frequency response
(deviation from
center frequency)

at ± 100 kHz:-0.01 dB
at ± 150 kHz:-0.02 dB
at ± 200 kHz:-0.05 dB
Typical group delay
(deviation from
center frequency)

at ± 100 kHz:25 nsec
at ± 150 kHz:50 nsec
at ± 200 kHz:120 nsec
Typical bandwidth± 200 kHz:
Spur rejection, ± 800 kHz or greater:Greater than 80 db

2640-04-1/1 & 2640-04-1/3 Balanced Combiner Weights

Inputs, Outputs and Weight2640-04-1/12640-04-1/3
Input Connection:1 5/8 EIA (7/8 EIA available)
Input Hybrid:1 5/8 EIA
Output Connection:1 5/8 EIA3 1/8 EIA
Output Hybrid:1 5/8 EIA3 1/8 EIA
Maximum narrowband input power:5 kW
Maximum power through output hybrid:

Average15 kW40 kW
PeakTBD440 kW
Shipping Weight:300 lb (136 kg) est.

 

2940-N/1-04

2640-06-1/1 & 2640-06-1/3 Balanced Combiner Specs

Performance Specifications
Type:Interdigital
Size:6"
No. of Cavities per Filter4
Typical VSWR
(deviation from
center frequency)

at ± 100 kHz:1.04:1
at ± 150 kHz:1.04:1
at ± 200 kHz:1.06:1
Typical Insertion Loss- 0.60 dB
Typical frequency response
(deviation from
center frequency)

at ± 100 kHz:-0.01 dB
at ± 150 kHz:-0.02 dB
at ± 200 kHz:-0.05 dB
Typical group delay
(deviation from
center frequency)

at ± 100 kHz:25 nsec
at ± 150 kHz:50 nsec
at ± 200 kHz:120 nsec
Typical bandwidth± 200 kHz:
Spur rejection, ± 800 kHz or greater:Greater than 80 db

2640-06-1/1 & 2640-06-1/3 Balanced Combiner Weights

Inputs, Outputs and Weight2640-04-1/12640-04-1/3
Input Connection:1 5/8 EIA (7/8 EIA available)
Input Hybrid:1 5/8 EIA
Output Connection:1 5/8 EIA3 1/8 EIA
Output Hybrid:1 5/8 EIA3 1/8 EIA
Maximum narrowband input power:5 kW
Maximum power through output hybrid:

Average15 kW40 kW
PeakTBD440 kW
Shipping Weight:300 lb (136 kg) est.

 

2540-12 Balanced Combiner Specs

Performance Specifications
Type:Resonant Cavity
Size:12"
No. of Cavities per Filter234
Typical VSWR
(deviation from
center frequency)

at ± 100 kHz:1.04:1
at ± 150 kHz:1.04:1
at ± 200 kHz:1.08:1
Typical Insertion Loss- 0.20 dB- 0.25 dB- 0.35 dB
Typical frequency response
(deviation from
center frequency)

at ± 100 kHz:-0.01 dB
at ± 150 kHz:-0.02 dB
at ± 200 kHz:-0.05 dB
Typical group delay
(deviation from
center frequency)

at ± 100 kHz:30 nsec
at ± 150 kHz:50 nsec
at ± 200 kHz:120 nsec
Typical bandwidth± 200 kHz:
Spur rejection, >80 db2.0 MHz1.2 MHz0.8 MHz

2540-12 Balanced Combiner Power ratings and Weights

Inputs, Outputs and Weight2540-12-1/32540-12-1/42540-12-3/32540-12-3/4
Input Connection:1 5/8 EIA3 1/8 EIA
Input Hybrid:1 5/8 EIA3 1/8 EIA
Output Connection:3 1/8 EIA3 1/8, 4 1/16 or 6 1/8 EIA3 1/8 EIA3 1/8, 4 1/16 or 6 1/8 EIA
Output Hybrid:3 1/8 EIA3 1/8, 4 1/16 or 6 1/8 EIA3 1/8 EIA3 1/8, 4 1/16 or 6 1/8 EIA
Maximum module input power:30 kW40 kW
Maximum power through output hybrid:

Average40 kW80 kW40 kW80 kW
Peak440 kW700 kW440 kW700 kW
Shipping Weight:


4 cavity760 lb (345 kg)810 lb (368 kg)780 lb (355 kg)830 lb (377 kg)
3 cavity560 lb (255 kg)610 lb (277 kg)580 lb (264 kg)630 lb (286 kg)
2 cavity400 lb (182 kg)450 lb (205 kg)420 lb (191 kg)450 lb (205 kg)

2540-24 Balanced Combiner Specs

Performance Specifications
Type:Resonant Cavity
Size:24"
No. of Cavities per Filter234
Typical VSWR
(deviation from
center frequency)

at ± 100 kHz:1.05:1
at ± 150 kHz:1.10:1
at ± 200 kHz:1.20:1
Typical Insertion Loss- 0.15 dB- 0.23 dB- 0.30 dB
Typical frequency response
(deviation from
center frequency)

at ± 100 kHz:-0.01 dB
at ± 150 kHz:-0.02 dB
at ± 200 kHz:-0.05 dB
Typical group delay
(deviation from
center frequency)

at ± 100 kHz:25 nsec
at ± 150 kHz:50 nsec
at ± 200 kHz:150 nsec
Typical bandwidth± 200 kHz:
Spur rejection, +/-800 kHz or greater:Greater than 80 db

2540-24 Balanced Combiner Power ratings and weights

Inputs, Outputs and Weight2540-24-3/42540-24-3/62540-24-3/9
Input Connection:3 1/8 EIA3 1/8 EIA3 1/8 EIA
Input Hybrid:3 1/8 EIA3 1/8 EIA3 1/8 EIA
Output Connection:4 1/16 or 6 1/8 EIA6 1/8 EIA9 1/8 EIA
Output Hybrid:4 1/166 1/8 EIA9 1/8" EIA
Maximum module input power:40 kW
Maximum power through output hybrid:

Average80 kW160 kW320 kW
Peak700 kW1500 kW3200 kW
Shipping Weight:


4 cavity1400 lb (636 kg)1500 lb (682 kg)1800 lb (818 kg)
3 cavitytbd lb (255 kg)tbd lb (277 kg)tbd lb (264 kg)
2 cavitytbd lb (182 kg)tbd lb (205 kg)tbd lb (191 kg)

 

SKU: Balanced Combiner CATEGORY: TAGS:
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