GP2Y1+ - 2-Way MMIC Splitter 1550-4400 MHz | Mini-Circuits
MPN: GP2Y1+ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.49 | $1.49 |
| 10 | $1.34 | $13.40 |
| 100 | $1.19 | $119.00 |
| 500 | $1.04 | $520.00 |
| 1,000 | $0.92 | $920.00 |
GP2Y1+ Overview
An MMIC power splitter is a passive RF component that divides an input signal into two equal-amplitude, equal-phase outputs (splitter mode) or conversely combines two signals into a common port (combiner mode) with high isolation between output ports. Splitters/combiners sit inside the RF front-end hierarchy between the transceiver and the antenna network, where they enable functions such as diversity reception, balanced power amplifier combining, and LO distribution. MMIC realizations use a semiconductor process to integrate resistive or transformer-based networks on a single die, yielding smaller size, broader bandwidth, and tighter unit-to-unit consistency than traditional discrete resistive or Wilkinson designs.
Key features include 1.55 GHz to 4.4 GHz operating bandwidth, 1.9 dB insertion loss over the band, 12 dB minimum port-to-port isolation, 1.4 typical VSWR at each port, 6 degree amplitude/phase imbalance maximum, and a robust operating temperature range of -40C to +85C. The DQ1225 case is a 3 mm x 3 mm x 0.9 mm surface-mount land grid compatible with standard pick-and-place and lead-free reflow.
Architecturally, the GP2Y1+ uses a GaAs MMIC die with on-waide balun and resistor networks that absorb mismatched power and deliver stable amplitude and phase balance over the 1.55 to 4.4 GHz band. The exposed bottom pad provides a low-inductance RF ground and a thermal path for the die, which improves power handling consistency between units.
Typical applications include 4G/LTE and 5G NR sub-6 GHz infrastructure, Wi-Fi 6/6E MIMO radios, point-to-point and small-cell backhaul, GPS/GNSS signal distribution, and test-and-measurement setups where a compact, broadband 2-way resistive/transformer split is required. Designers can use it as a power combiner for balanced PA architectures or as an LO splitter for multi-channel transceivers.
When laying out the PCB, keep all three RF traces (J1, J2, J3) length-matched and symmetrically routed away from the part with a continuous ground reference. Place DC-blocking and matching components close to the part and avoid routing high-speed digital lines under the exposed pad to preserve isolation.
This page synthesizes distributor pricing, package mechanical drawings, and a drop-in alternatives list with practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for GP2Y1+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with GP2Y1+ (same form factor and footprint) — differing in Function, RoHS Status, Frequency Range, Isolation, Part Number.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
GP2Y1A+
✅ Drop-In✓ In Stock
$2.61 / Unit
View Datasheet →GP2X1+
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
GP2Y+
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.95 / Unit
View Datasheet →GP2Y1+ Specifications (manufacturer-published)
| Function | 2-Way Power Splitter/Combiner |
| Topology | MMIC resistive/balun |
| Frequency Range | 1550 MHz to 4400 MHz |
| Insertion Loss (above 3 dB) | 1.9 dB (typ) |
| Isolation | 12 dB (min) |
| VSWR (Typical) | 1.4 |
| Amplitude Imbalance | 6 degree (max) |
| Impedance | 50 ohm |
| Number of Ports | 3 (1 input, 2 output) |
| Package / Case Style | DQ1225, 12-VQFN Exposed Pad |
| Package Size | 3 mm x 3 mm x 0.9 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
| Lead-Free / Reflow | Yes, lead-free reflow compatible |
GP2Y1+ Pin Configuration
| Pin 1 | GND — RF ground / thermal pad tie-down |
| Pin 2 | GND — RF ground / thermal pad tie-down |
| Pin 3 | J2 — RF port 2 (output when input at J1) |
| Pin 4 | GND — RF ground / thermal pad tie-down |
| Pin 5 | J1 — RF common port (input when used as splitter) |
| Pin 6 | GND — RF ground / thermal pad tie-down |
| Pin 7 | J3 — RF port 3 (output when input at J1) |
| Pin 8 | GND — RF ground / thermal pad tie-down |
| Pin 9 | GND — RF ground / thermal pad tie-down |
| Pin 10 | GND — RF ground / thermal pad tie-down |
| Pin 11 | GND — RF ground / thermal pad tie-down |
| Pin 12 | GND — RF ground / thermal pad tie-down |
Power & Thermal Characteristics
| Operating Temperature | -40C to +85C |
Power input and thermal parameters for GP2Y1+ as published by the manufacturer.
Typical Applications
GP2Y1+ is suitable for 6 applications: 4G/LTE and 5G NR Sub-6 GHz Radio Heads, Wi-Fi 6 / Wi-Fi 6E MIMO Routers, Small-Cell and Pico-Cell Backhaul, GPS/GNSS Signal Distribution, LO Distribution in Multi-Channel Transceivers, Test and Measurement Signal Routing.
4G/LTE and 5G NR Sub-6 GHz Radio Heads
The GP2Y1+'s 1550-4400 MHz band directly spans LTE B7, 5G NR n77/n78, and adjacent sub-6 GHz allocations used in macro and small-cell radio heads. Its 12 dB isolation and 1.4 VSWR suit diversity reception paths where two antenna streams are combined at baseband, while the 1.9 dB insertion loss preserves the link margin budgeted by the radio designer. Placed after the LNA on each diversity branch with length-matched traces, it enables 2x2 and 4x4 MIMO receive topologies without sacrificing noise figure excessively. The DQ1225 3 mm x 3 mm footprint allows dense layouts in space-constrained remote radio units and active antenna systems.
Recommended
Wi-Fi 6 / Wi-Fi 6E MIMO Routers
The GP2Y1+ covers the 2.4 GHz ISM and 5 GHz UNII bands central to Wi-Fi 6/6E access points, where 2x2 and 4x4 MIMO architectures require broadband, low-VSWR splitting. The 1.4 VSWR and 6 degree amplitude/phase imbalance help maintain the EVM floor required for 1024-QAM modulation at the higher MCS rates. Used between the radio SoC and the dual-polarized antenna chain, it enables transmit/receive diversity and beamforming reference distribution in a compact 3 mm x 3 mm land pattern. The exposed pad provides robust thermal relief during continuous-duty transmit operation.
Recommended
Small-Cell and Pico-Cell Backhaul
In small-cell backhaul radios operating in licensed or lightly-licensed sub-6 GHz bands, the GP2Y1+ splits the local oscillator between the transmit and receive chains with sufficient isolation to prevent TX leakage into the RX path. Its 12 dB isolation and broadband behavior allow a single part to cover multi-band backhaul designs, simplifying the BOM and reducing tuning overhead. The 50 ohm interface matches standard transceiver reference designs, and the 3 mm x 3 mm DQ1225 footprint is small enough to fit beneath the transceiver shield can. The MMIC construction delivers unit-to-unit consistency that simplifies factory alignment.
Recommended
GPS/GNSS Signal Distribution
GPS L1/L2/L5 and GNSS bands fall within the GP2Y1+ operating range, allowing it to distribute a single GNSS antenna signal to multiple receivers for timing or position-stacking applications. The 12 dB port-to-port isolation prevents a sensitive receiver's local oscillator from coupling back through the antenna feed, preserving the carrier-to-noise ratio needed for sub-meter positioning. Used at the output of an active GNSS antenna with a DC-blocked feed, it splits the signal to two timing receivers in a cellular base station or financial trading system. The DQ1225 exposed pad provides low-impedance grounding essential at GNSS frequencies.
Recommended
LO Distribution in Multi-Channel Transceivers
The GP2Y1+ can split a single local oscillator between multiple transmit or receive channels in phased-array or multi-channel transceivers operating across 1550-4400 MHz. Its 12 dB isolation prevents LO leakage between channels that would otherwise degrade phase noise and spurious performance. Placed after the LO buffer with symmetric trace routing, it preserves phase coherence across channels critical for beamforming accuracy. The MMIC process and 3 mm x 3 mm footprint enable dense LO trees for 4-element and 8-element antenna arrays without consuming excessive board area.
Recommended
Test and Measurement Signal Routing
In bench test equipment and production ATE, the GP2Y1+ serves as a broadband 2-way signal splitter for stimulus distribution to two devices under test or for combining two signal generators. Its 1.4 VSWR and 6 degree amplitude/phase imbalance provide the amplitude and phase accuracy needed for production test margin, while its 1550-4400 MHz coverage eliminates the need for multiple band-specific splitters. Used at the front panel of a vector signal analyzer or as a fixture combiner, it provides repeatable unit-to-unit performance thanks to its MMIC construction. The DQ1225 footprint fits standard test fixture land patterns.
Recommended
Recommended Products Summary
Engineering reference data for GP2Y1+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | GP2Y1A+ | GP2X1+ | GP2Y+ |
|---|---|---|---|---|
| Package | DQ1225 (12-VQFN-EP) | DQ1225 (12-VQFN-EP) - same | DQ1225 (12-VQFN-EP) - same | DQ1225 (12-VQFN-EP) - same |
| Brand | Mini-Circuits | Mini-Circuits | Mini-Circuits | Mini-Circuits |
| Frequency Range | 1550-4400 MHz | 1550-4400 MHz | 3700-8300 MHz (higher band) | 800-2500 MHz (lower band) |
| Impedance | 50 ohm | 50 ohm | 50 ohm | 50 ohm |
| Replacement Status | Original | Form-fit-function replacement | Family higher-band variant | Family lower-band variant |
Key Differentiators
- Drop-in replacement availability with explicit manufacturer validation (vs GP2Y1A+)
- Compact 3 mm x 3 mm DQ1225 MMIC footprint (vs GP2X1+ (higher-band sibling))
- Broadband single-part coverage of 4G/5G/Wi-Fi bands (vs Discrete Wilkinson splitter)
Design Notes
Route all three RF traces (J1, J2, J3) as 50 ohm microstrip or coplanar waveguide with the characteristic impedance verified by the board stack-up. Keep traces length-matched between J2 and J3 within a few degrees of electrical length at the highest operating frequency (4400 MHz corresponds to roughly 1.5 mm per degree of phase). Place the part's exposed bottom pad over a continuous ground pour with multiple stitched vias to suppress parallel-plate modes and ensure low thermal impedance.
Although the GP2Y1+ is a passive MMIC, the internal die still dissipates a small amount of power as heat under continuous RF excitation. Solder the exposed bottom pad to a ground pour with sufficient copper area (at least 25 mm x 25 mm of 1 oz copper on each layer, stitched with vias) to keep the junction temperature near ambient. In high-density layouts, ensure adequate copper around adjacent active components to prevent thermal coupling that could shift the splitter's amplitude balance.
Do not route high-speed digital lines or switching-power traces directly under the GP2Y1+ package; coupling into the RF traces will degrade isolation and may modulate the splitter's amplitude balance. Avoid placing the part near the edge of the board or near I/O connectors where the RF ground reference may be discontinuous. If the design requires DC bias on the RF lines, add external DC-blocking capacitors at all three RF ports per the Mini-Circuits reference design to prevent DC paths into the MMIC die.
Compliance Information
RoHS-compliant per DigiKey and Mini-Circuits product listings; lead-free reflow compatible per manufacturer datasheet. Halogen-free status not explicitly stated in the provided data.
