Power Splitter / Power Combiner
3Way RF Power Dividers

In-Line, PD1030

Power Divider, Power Combiner, 3-Way, In-Line, N-Jack Connectors

N-Type Jack Power Divider

T-Style, PD3030

Power Divider, Power Combiner, 3-Way, T-Style, N-Jack Connectors

N Female Power Splitter

In-Line, PD1130

Power Divider, Power Combiner, 3-Way, In-Line, SMA-Jack Connectors

SMA Jack Power Divider

T-Style, PD3130

Power Divider, Power Combiner, 3-Way, T-Style, SMA-Jack Connectors

SMA Female Power Splitter

DIVIDER / SPLITTERTheoretical Insertion Loss due to N-Way Power Split
  • N Way
  • 2 Way
  • 3 Way
  • 4 Way
  • 6 Way
  • 8 Way
  • 12 Way
  • 16 Way
  • 24 Way
  • 32 Way
  • Insertion Loss*
  • 3.01 dB
  • 4.77 dB
  • 6.02 dB
  • 7.78 dB
  • 9.03 dB
  • 10.79 dB
  • 12.04 dB
  • 13.80 dB
  • 15.05 dB
Formula for Insertion Loss due to N-Way Power Split: IL = 10 log (1/N-Way)
*Not true insertion loss as this power is recoverable.

3 Way Power Divider, Combiner, Splitter

Type N & SMA Female (Jack) Connectors, 0.698-2.700 GHz, 40 Watts

Application Note

STOCK three way power divider, power combiners are available in two configurations, in-line and T-style, each offered with type-N female (jack) and SMA female (jack) connectors. All 4 models are optimized for broadband operation covering the frequency range from 0.698 to 2.700 GHz with unsusrpassed electrical performance. These Wilkinson hybrid, 3 way, power divider, power combiners are reciprocal units that can be used to divide or combine signals with equal facility. Their microstrip construction passes DC current to all ports for use in active systems.

In power dividing applications, the input signal is equally split into three output signals, each down 4.77 dB from the incident due to the 1:3 power division. No power is actually lost from this power split; it is just allocated into three amplitude and phase matched signals, thus a so called 4.77 dB insertion loss. True insertion loss of less than 0.7 dB max will be found at the output ports resulting from dissipation of small amounts of RF & microwave energy within the connectors and microstrip circuit. The output signals are isolated from each other by 22 dB minimum through the use of resistors that dissipate any power reflected back to the circuit caused by unequal or unbalanced output loads. The 40 watt maximum power rating of these power dividers is applicable when connected to matched

3-Way Power Divider Input Ratings
Into Matched
0° Difference
1.2 : 1 40 Watts 40 Watts
2.0 : 1 40 Watts 10 Watts
VSWR = infinity (open or short) 20 Watts 1 Watt
3-Way Power Combiner Input Ratings
Input Signals 0° Phase
180° Phase
Coherent 3 X 13.3 Watts 3 X 0.33 Watts
Non-Coherent 3 X 0.66 Watts
3-Way, In-Line, Power Divider Circuit

Three-Way, In Line, RF Microwave
Power Divider, Combiner, Splitter
Microstrip Circuit Passes DC Current

Power Divider Frequency Applications
Public Safety Band 800 MHz Cellular
GSM 850 GSM 900
GSM 1800 GSM 1900
PCS 1900 L-Band
IEEE802.11b/g ISM
» click respective band for more information »

output load VSWR of 1.2:1 or better. This maximum power rating must be reduced when load VSWR's increase and are unbalanced or out-of-phase with respect to one another. See Power Divider Input Ratings Table for additional guidelines.

The situation with power combining is a bit more complex. While it is possible to sum three input signals with no loss, this can only be accomplished if the signals are coherent and identical in phase and amplitude. Such a case would be the three way power splitting of a signal which is then recombined after amplification, provided the amplified signals are phase locked together. But outside this case, or cases of pure sine signals, or CW signals without any transmitted information, the combining of three non-coherent signals will result in a minimum 4.77 dB loss (1/3rd power ratio) plus the true insertion loss of the power combiner (0.7 dB max @ 2.7 GHz). Worst-case combining loss occurs with coherent signals 180° out-of-phase, where all input power is dissipated. Because the combining loss is dissipated through the isolation resistors, the power handling and heat transfer capabilities of these resistors ultimately determines the maximum combiner power rating. See 3 Way Power Combiner Input Ratings Table (left) for more information.

Contact INSTOCK for unique solutions to your high power combiner requirements.

3-Way, T-Style, Power Divider Circuit

Three-Way, T Style, RF Microwave
Power Divider, Combiner, Splitter
Microstrip Circuit Passes DC Current

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