Power Splitter / Power Combiner

PD2720 - RF Microwave Power Divider Combiner

2-Way, QMA Female, 698-2700 MHz, 40 Watts

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QMA Power Divider Combiner for GSM, CDMA, Cell Band, 3G, 4G LTE, DAS

3G, 4G LTE, DAS Power Divider Combiner
RoHS, QMA Female, 698 - 2700 MHz, 40 Watts

  • Wideband Frequency (698 - 2700 MHz)
  • Low Insertion Loss (0.2 dB avg)
  • High Port to Port Isolation (30 dB avg)
  • Excellent VSWR (1.10 : 1 avg)
  • RoHS Compliant Splitter Construction
  • Tri Alloy QMA Female (Jack) 50 Ohm
2 Way Power Divider RF Input Ratings
Into Matched
Load VSWR's
In-Phase 180°
1.2 : 1 40 Watts 40 Watts
2.0 : 1 40 Watts 10 Watts
VSWR = infinity (open or short) 20 Watts 1 Watt
2 Way Power Combiner RF Input Ratings
Input Signals In-Phase 180°
Coherent 2 X 20 Watts 2 X 0.5 Watts
Non-Coherent 2 X 1 Watt
RF Splitter Combiner QMA-jack Outline Drawing
Mechanical Specifications
Circuit Design ……… 
Wilkinson Microstrip passes
DC Current thru all ports
Connectors ……………  QMA Female, 50 Ohm Coaxial
Body ……………………  Brass, Tri-Alloy Plate
Connector Pin …  Beryllium Copper, Gold Plate
Insulator ……………  PTFE, Virgin Electrical Grade
Housing …………………  Aluminum, Clear Chem Film
Operating Temp …  -65°C to +85°C
Weight ……………………  134 Grams

PD2720 - QMA Power Divider Combiner Specifications

Frequency Range (MHz) Insertion Loss above 3.01 dB Amplitude
Isolation Input
698-2700 0.5 dB max 0.2 dB max 2° max 22 dB min 1.30 : 1 max 1.15 : 1 max

PD2720, 698 - 2700 MHz QMA Splitter Combiner Test Data

QMA Power Divider Combiner, 2 Way - Insertion Loss
Insertion Loss Test Sweep for Model PD2720 from INSTOCK Wireless.
QMA Power Divider Combiner, 2 Way - Isolation
Isolation Test Sweep for Model PD2720 from INSTOCK Wireless.
QMA Power Divider Combiner, 2 Way - VSWR
Input VSWR Test Sweep for Model PD2720 from INSTOCK Wireless. Output VSWR Test Sweep for Model PD2720 from INSTOCK Wireless.

Input Return Loss

Output Return Loss

PD2720 - Features & Benefits


PD2720 is a RoHS compliant, 2 way, wideband, 50 ohm, RF power divider, power combiner furnished with QMA jack female coaxial connectors. All wireless band frequencies in the range from 698 to 2700 MHz are covered with optimal RF performance. Max microwave input power levels up to 40 watts can be handled in both power splitter and power combiner applications. See 2 way power divider input rating tables for additional details.


The heart of the unit is a precision designed and etched Wilkinson type microstrip circuit on a low loss, high frequency, dielectric substrate. Electrical performance is highlighted by 0.5 dB max insertion loss (above the 3.01 dB power split), 22 dB min isolation, 1.30:1 max input VSWR and 1.15:1 max output port VSWR. Equal power split and symmetry is displayed by 0.2 dB amplitude balance and 2 degrees phase balance. Narrow band RF performance over your frequency range may be even better. See 2 way power divider test sweeps for details.


Mechanical features include precision CNC, brass, 50 ohm QMA female coaxial connectors with tri alloy plating to insure tarnish resistance and low PIM operation. Connector pins are gold plated beryllium copper for reliability and low contact resistance. Virgin electrical grade PTFE support insulators captivate the contact pins enabling trouble free coaxial connector mating. Long term operation and superior shielding is assured by the rugged CNC machined aluminum housing with clear chemical film finish. Secure mounting is provided by two 0.125" diameter (3.18 mm) through holes. RoHS construction includes no-lead solder and a finish free of hexavalent chromium.


Housing dimensions are 1.98" wide by 1.98" deep by 0.88" high (50.3 x 50.3 x 22.2 mm). The QMA female (jack) connectors extend 0.56" (14.3 mm) from the housing. Operating temperature range is from -65°C to +85°C. Weight is 134 grams. See 2 way QMA splitter outline drawing for more information.


The PD2720 2-way, QMA-jack, 698-2700 MHz power splitter combiner is ideal for a wide range of wireless radio frequency microwave applications on both transmit and receive sides, ranging from amplifier sharing & receiver combining to antenna splitting, and is deployed world wide in networks encompassing 700 MHz Public Safety Band, 800 MHz cellular, GSM 850, 900, 1800 & 1900, PCS 1900, 1 GHz to 2 GHz L-Band, GPS, W-CDMA-3G, UMTS, TETRA, RFID, IEEE802.11b/g, 2.45 GHz ISM, Wi Fi and 2.3 GHz & 2.5 GHz WiMAX.

Options / Additional Models

SMA (Threaded): An SMA version of this two way power splitter is available with threaded SMA-jack female connectors on all ports and spanning 698-2700 MHz. PD2120

DC Blocking: Two DC blocking versions of this 2way divider combiner available:

PD5120: DC pass 1 port, DC block other port. Typically used for powering an active antenna through the DC pass port of the RF power divider splitter.

PD5122: DC block 2 ports. Typically used in combining applications to prevent passing DC to sum port or other input.

GPS Splitter: 1x2 GPS antenna signal splitter covering GPS / GNSS global navigation satellite system positioning frequency bands. GPS210

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