Dual band Combiner Diplexer 80-2690/3300-5925 MHz
RF and Microwave Combiners are high-precision passive components engineered to merge multiple independent RF signals into a single transmission path or, conversely, to divide a signal into multiple outputs (acting as splitters). Their primary function is to enable “Co-siting”—the ability of multiple transmitters or frequency bands to utilize a single antenna system—while maintaining high port-to-port isolation and minimal insertion loss.
Description
Description
80-5925 MHz Dual Band Combiner Duplexer Diplexer
Description of Dual band Combiner Diplexer 80-2690/3300-5925 MHz
Wide frequency range 80-5925MHZ for 2G/3G /4G/LTE/5G applications
- Low Passive Inter-modulation
- Low VSWR & Insertion Loss
- High Isolation, Indoor & Outdoor, IP67
- Widely used for In-building Solutions
Specifications of Dual band Combiner Diplexer 80-2690/3300-5925 MHz
| Electrical | ||
| Frequency range (MHz) | Port1 | Port2 |
| 80-2690 | 3300-5925 | |
| Insertion Loss(dB) | Typ≤0.25 Max≤0.4 | |
| Port Isolation(dB) | ≥50 | |
| VSWR | ≤-18dB/1.3 | |
| Intermodulation (dBc) | ≤-150dBc (with 2×43dBm) | |
| Impedance (Ω) | 50 Ω | |
| DC/AISG | By-pass@80-2690MHz | |
| Lightning protection | 10KA；10/350us pulse | |
| Input power (W) | 100 | |
| Environmental | ||
| Operation temperature | -20 °C to +65 °C | |
| Storage temperature | -40 °C to +85 °C | |
| Relative humidity | 5% – 95% | |
| Application | Indoor or outdoor (IP66) | |
| Mechanical | ||
| Connector | 4.3-10-Female | |
Description of Combiners
RF and microwave combiners are passive devices designed to merge two or more input signals into a single common output (combining) or to divide a single input into multiple outputs (splitting). They are fundamental to telecommunications, allowing multiple frequency bands or service providers to share a single antenna system without interference.
1. Core Types of Combiners
- Hybrid Combiners (Matrix/Bridge): These utilize 3dB hybrid couplers to combine uncorrelated signals. They are “lossy” by nature (a 2:1 hybrid has a 3dB loss), but they offer wide bandwidth and excellent isolation between ports. They are commonly used in DAS (Distributed Antenna Systems) to combine different carrier frequencies.
- Cavity Combiners (Filter-based): These use high-Q resonant cavities to combine signals of different frequencies. Because they are frequency-selective, they offer extremely low insertion loss (often <1dB) and very high isolation. However, they are narrowband and must be tuned to specific frequencies.
- Wilkinson Combiners: These use quarter-wave transformers and an isolation resistor. They provide low loss and high isolation but are generally limited to lower power applications and specific bandwidths.
- Resistive Combiners: The simplest form, using resistors to merge signals. While they have high bandwidth (down to DC), they suffer from significant power loss and are mostly used for low-power laboratory testing.
2. Key Performance Specifications
- Insertion Loss: The amount of signal power lost as it travels from input to output. Minimizing this is critical for maintaining coverage range.
- Isolation: The degree to which signals at one input port are prevented from leaking into another input port. High isolation (typically >30dB) is required to prevent intermodulation distortion and damage to transmitters.
- Passive Intermodulation (PIM): In high-power systems (like LTE/5G), poor mechanical junctions in a combiner can create “noise” (PIM). High-quality combiners are rated for low PIM (e.g., -153 dBc or better).
- VSWR (Voltage Standing Wave Ratio): A measure of how well the combiner is matched to the 50-ohm system. A low VSWR (e.g., <1.25:1) ensures that power is transmitted forward rather than reflected back to the source.
- Power Handling: The maximum wattage (average and peak) the combiner can handle without overheating or arcing.
3. Primary Applications
- Base Station Infrastructure: Allowing multiple radios (GSM, LTE, 5G) to connect to a single feeder cable and antenna on a tower.
- DAS (Distributed Antenna Systems): Merging signals from multiple mobile operators into a single indoor cable network.
- Carrier Aggregation: Combining different frequency blocks to increase data throughput for mobile users.
- Testing and Measurement: Splitting a signal to be measured by multiple instruments (Spectrum Analyzers, Power Meters) simultaneously.
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