MICROLAB/FXR CA-64N Hybrid Coupler Rf Splitter 3DB 698-960

( Brand: Microlab/fxr ), ( Manufacturer Part Number: CA-64N ), ( Compatible Brand: Universal ), ( Type: Hybrid Coupler ), ( Band: Uhf ), ( Country Of Origin: United States )

Review MICROLAB/FXR 3db Hybrid Coupler Mhz Rf Splitter

The **Microlab FXR CA-64N 3dB Hybrid Coupler (698 960 MHz)** is a high-performance, precision-engineered RF component designed for demanding applications in telecommunications, broadcasting, and test-and-measurement systems. Part of Microlab s renowned FXR series, this hybrid coupler stands out as a versatile and reliable solution for signal distribution, power splitting, and directional coupling within the 698 960 MHz frequency range. Constructed with robust, high-grade materials, the CA-64N combines exceptional electrical performance with a compact, rugged design, making it ideal for both laboratory and field deployments. Its **3dB insertion loss** ensures minimal signal attenuation, delivering near-perfect power division while maintaining phase coherence between the input and output ports. The hybrid coupler operates on the principle of balanced mixing, where two input signals are combined into a single output, or conversely, a single input signal is split into two equal, phase-aligned outputs with minimal cross-talk, making it indispensable for applications such as RF signal monitoring, antenna diversity systems, and balanced mixer circuits. With a **N-type female connector interface**, the CA-64N ensures secure, low-loss connections, reducing the risk of signal degradation or reflection. Its **wideband operation** within the specified frequency range guarantees consistent performance across diverse applications, from analog broadcasting to digital communication systems. Additionally, the coupler s **low VSWR (Voltage Standing Wave Ratio)** and **high isolation** between ports further enhance its reliability, ensuring stable operation even under varying load conditions. Whether used in RF test setups, signal routing, or as part of a larger RF subsystem, the Microlab FXR CA-64N delivers uncompromising precision, durability, and efficiency, making it a trusted choice for engineers and technicians demanding top-tier RF performance.

The **Microlab/FXR CA-64N 3dB Hybrid Coupler (698 960 MHz)** is a versatile RF device used for signal splitting, combining, or directional applications in amateur radio, repeaters, and other RF systems. Below are its key pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Balanced Performance**

The hybrid coupler operates as a 3dB splitter/combiner, providing equal power division (or combination) with minimal insertion loss. This makes it ideal for applications where balanced signals are required, such as in directional antennas (e.g., Yagi or dipole feeds) or for combining two transmitters into a single feedline.

2. **Wide Frequency Range (698 960 MHz)**

The device covers the 70cm amateur band (420 450 MHz) and extends into the 23cm band (1240 1300 MHz), though performance may degrade slightly at the upper end. This flexibility is useful for multi-band setups.

3. **Low Insertion Loss**

With a 3dB loss per port, the coupler maintains signal integrity better than some passive splitters, which can introduce higher losses (e.g., 6dB or more). This is particularly beneficial for low-power transmitters or sensitive receivers.

4. **Isolation and Directionality**

Hybrid couplers provide isolation between ports (typically 20 30dB), which helps prevent feedback or interference in systems where signals are routed in opposite directions (e.g., a duplexer setup or a directional antenna feed).

5. **Durability and Reliability**

FXR/Microlab components are known for robust construction, often using high-quality connectors (e.g., N-type) and shielding to minimize interference. This makes the CA-64N suitable for outdoor or high-power applications when properly matched.

6. **Versatile Applications**

- A **duplexer** (with additional components) for simultaneous transmit/receive on the same antenna.

- A **circulator** in certain configurations (though not a true circulator, it provides directional properties).

- A **mixer** for combining signals from two transmitters (e.g., for diversity or power combining).

7. **Easy to Integrate**

The N-type connectors are standard in amateur radio, making it straightforward to integrate with coax cables, amplifiers, or other RF equipment. No special tools or adjustments are typically required for basic use.

8. **Cost-Effective for the Functionality**

Compared to commercial-grade duplexers or circulators, the CA-64N offers similar directional properties at a lower cost, making it attractive for hobbyists and small repeaters.

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### **Cons**

1. **Limited Frequency Bandwidth**

While the 698 960 MHz range is useful, it does not cover the full 23cm band (1240 1300 MHz) optimally. Performance may degrade at the upper end, leading to higher losses or mismatch. For 23cm use, a separate coupler or a wider-bandwidth device (e.g., a circulator) may be needed.

2. **Not a True Circulator**

The hybrid coupler provides directional properties but lacks the full isolation and low insertion loss of a true circulator (e.g., a 3-port circulator). In applications requiring high isolation (e.g., high-power transmitters), a circulator may be preferable.

3. **Polarity Sensitivity**

Hybrid couplers are sensitive to signal polarity. Incorrect wiring (e.g., reversing inputs/outputs) can lead to destructive interference or reduced performance. This requires careful attention during installation.

4. **Power Handling Limitations**

While the CA-64N can handle moderate power levels (typically up to a few hundred watts CW), it is not designed for high-power applications (e.g., 1kW ). For such uses, a higher-power-rated device (e.g., a commercial circulator) is recommended.

5. **Size and Installation Constraints**

The coupler is a passive device that requires proper shielding and grounding to avoid interference. In outdoor installations, it may need to be housed in a protective enclosure to prevent damage from weather or physical stress.

6. **No Built-in Protection**

Unlike some commercial RF devices, the CA-64N lacks built-in protection against voltage spikes or harmonics. Users must ensure proper filtering and grounding to avoid damage to the coupler or connected equipment.

7. **Limited Commercial Support**

As a niche component, the CA-64N may not have extensive documentation or readily available technical support compared to mainstream commercial products. Troubleshooting may require deeper RF knowledge.

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### **Conclusion**

The **Microlab/FXR CA-64N 3dB Hybrid Coupler** is a practical and cost-effective solution for amateur radio operators and small repeaters needing balanced signal splitting, combining, or directional routing within its specified frequency range. Its low insertion loss, isolation properties, and versatility make it suitable for applications like duplexer setups, antenna feeds, or transmitter combining. However, its limitations such as the narrow bandwidth, lack of circulator-level isolation, and sensitivity to polarity mean it is not ideal for high-power or wide-bandwidth applications.

For most **70cm (420 450 MHz) and partial 23cm (1240 1300 MHz) use**, the CA-64N is a solid choice, especially when paired with proper filtering and grounding. If higher isolation, wider bandwidth, or higher power handling is required, a circulator or a commercial-grade duplexer may be preferable.

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### **Recommendation**

- You need a reliable, low-cost 3dB splitter/combiner for **70cm or partial 23cm use**.

- Your application benefits from balanced signal routing (e.g., directional antennas, simple duplexing).

- You are comfortable with basic RF wiring and polarity considerations.

- You are operating at moderate power levels (under 500W CW).

- You require **full 23cm coverage (1240 1300 MHz)** with minimal loss opt for a wider-bandwidth coupler or circulator.

- Your application demands **high isolation** (e.g., high-power transmitters) a circulator is better suited.

- You lack experience with RF components and need plug-and-play simplicity commercial duplexers may be easier to integrate.

For most **homebrew repeaters or antenna systems**, the CA-64N is a **good value** and a practical choice. Pair it with proper coax (e.g., LMR-400 or hardline) and consider adding a **low-pass filter** if operating near harmonics to protect the coupler.

Details:

Designed for RF / talcum DAS applications. Unit is in good cosmetic condition with normal signs of prior use and handling. Pulled from service environment and sold as shown. Microlab CA-64N 3dB Hybrid Coupler 698-960 MHz RF Splitter, Genuine hybrid coupler / signal.

All connector ports appear intact. Please verify part number, frequency range, and application compatibility before purchasing.

part #: ca64n price

• $24.99

specifications hamamateuradio:

• brand: Microlab/fxr
• mpn: Ca-64n
• compatible brand: Universal
• type: Hybrid Coupler
• band: Uhf
• country of origin: United States

shipping hamamateuradio:

• carrier: USPS
• class: Standard
• transit: 4-10 Days
• cost: $0.00
• type: Fixed
• service: USPS Ground Advantage

offer hamamateuradio:

• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 1
• started: April 4, 2026
• availability: In Stock

general hamamateuradio:

• condition: Used
• Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment

returns hamamateuradio:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer
• method: Money back

payments hamamateuradio:

• other
• wallet: Paypal
• credit card: Mastercard

seller hamamateuradio:

• rating: 100.0%
• city: Fort Lauderdale, Florida
• # reviews: 2530

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