Hybrid Combiner Series

A hybrid combiner is a passive RF device that combines or splits signals from multiple sources while maintaining isolation between them. It uses hybrid coupler technology (typically 3 dB, 90° or 180° hybrids) to ensure efficient power combining with minimal signal interference.

A hybrid combiner uses phase shifting and coupling networks to combine two or more input signals. When the signals are equal in amplitude and phase, they combine constructively at the output port while unwanted components are isolated or terminated internally.

The two most common types are:

• 90° hybrid combiners (quadrature hybrids) – use a 90° phase shift between ports.

• 180° hybrid combiners (rat-race hybrids) – use a 180° phase difference for combination.

Both are designed to provide equal amplitude outputs with specific phase relationships.

A hybrid combiner provides port isolation and maintains good VSWR and phase balance, making it ideal for combining non-coherent signals.
A power combiner, on the other hand, may not offer high isolation and is typically used when sources are phase-synchronized.

Isolation ensures that energy from one transmitter does not feed back into another, which could cause intermodulation distortion or damage to sensitive equipment. High isolation protects system components and ensures signal purity.

Hybrid combiners are used in:

• Cellular base stations (2G–5G)

• Distributed Antenna Systems (DAS)

• Broadcast transmitters

• MIMO and diversity systems

• Test and measurement setups

Typical insertion loss ranges from 3.0 to 3.5 dB (due to power splitting/combining and internal dissipation). High-quality hybrids maintain low additional loss beyond the theoretical 3 dB combining loss.

Hybrid combiners are available across a wide range—from VHF (100 MHz) up to microwave frequencies (6–40 GHz)—depending on the design and materials used.

Low PIM hybrid combiners are specially designed to minimize passive intermodulation distortion. They use non-ferromagnetic materials and precision assembly to support multi-carrier cellular and DAS applications with PIM ratings as low as −150 dBc or better.

Amplitude balance refers to how evenly the hybrid combiner distributes or combines signal power between ports. Good amplitude balance ensures stable RF performance and is especially important in MIMO, beamforming, and balanced amplifier systems.

Leaving an unused port unterminated can cause signal reflections, degraded isolation, increased VSWR, and reduced overall system performance. Unused ports should always be terminated with the proper matched load.

Yes. Hybrid combiners are reciprocal passive devices, meaning they can also operate as signal splitters while maintaining the same isolation and phase characteristics.

Yes, many hybrid combiners are designed for outdoor telecom and industrial environments. These models typically feature weather-sealed housings, corrosion-resistant materials, and wide operating temperature ranges.

Phase balance ensures that output signals maintain the intended phase relationship, which is critical in applications such as phased arrays, balanced amplifiers, and coherent signal combining systems.

When choosing a hybrid combiner, consider:

• Frequency range (band coverage)

• Power handling (average and peak)

• Isolation and VSWR

• PIM performance (for cellular systems)

• Connector type (DIN, N, 4.3-10, SMA, etc.)

• Environmental rating (indoor/outdoor use)

To place an order for hybrid combiner please contact us and we will help you!