When comparing RG405 and LMR-100 for use in antenna cables, their different characteristics make them suitable for different applications. Here's an outline of the key differences and how each type is best suited for various antenna-related tasks:

1. Frequency Range:

• RG405: Supports frequencies up to 50 GHz, making it ideal for high-frequency applications such as microwave and millimeter-wave systems.
• LMR-100: Typically operates effectively up to 3 GHz, which makes it better suited for lower-frequency applications like VHF/UHF or Wi-Fi antennas.

Application Difference:

• RG405 is best for high-frequency antenna systems (e.g., satellite, radar, or microwave antennas).
• LMR-100 is appropriate for lower-frequency antenna systems (e.g., CB radio, GPS, or general wireless communications).

2. Attenuation (Signal Loss):

• RG405: Has lower attenuation, particularly at high frequencies. It is designed for applications requiring minimal signal loss over longer distances.
• LMR-100: Has higher attenuation, especially at higher frequencies, which makes it less suitable for long runs or high-frequency signals.

Application Difference:

• RG405 is ideal for long cable runs in high-frequency antenna systems where low signal loss is critical.
• LMR-100 is better suited for shorter cable runs in lower-frequency antenna applications, where some loss is acceptable.

3. Flexibility:

• RG405: Semi-rigid construction means it is not flexible. Once bent, it retains its shape, making it more difficult to install in environments requiring flexible routing.
• LMR-100: Highly flexible and easy to route through tight spaces or around obstacles.

Application Difference:

• RG405 is used in fixed installations or environments where rigidity and stability are necessary.
• LMR-100 is ideal for mobile or portable antenna systems where flexibility and ease of installation are more important.

4. Shielding and Interference Protection:

• RG405: Has excellent shielding due to its solid outer conductor, providing strong protection against electromagnetic interference (EMI).
• LMR-100: Offers decent shielding with a braided shield, but it is not as effective as the solid shielding of RG405.

Application Difference:

• RG405 is preferred in environments with high levels of electromagnetic interference or when superior shielding is needed for sensitive antenna systems.
• LMR-100 is adequate for less interference-prone environments or when shielding is not a primary concern.

5. Durability and Environmental Resistance:

• RG405: More durable due to its semi-rigid structure, making it suitable for environments where the cable won’t be frequently moved.
• LMR-100: More prone to wear and tear over time, but still suitable for most outdoor and indoor antenna applications, especially when portability or flexibility is required.

Application Difference:

• RG405 is used in environments where a long-lasting, durable connection is required, such as fixed, high-performance antenna installations.
• LMR-100 is more appropriate for environments where cables may need to be frequently moved or adjusted, such as in temporary or mobile setups.

6. Cost:

• RG405: More expensive due to its higher performance, shielding, and low-loss characteristics.
• LMR-100: Generally more affordable and available in various lengths and configurations.

Application Difference:

• RG405 is better suited for high-budget, performance-critical applications.
• LMR-100 is more commonly used in cost-sensitive installations where high performance is less critical.

Summary of Applications:

• RG405:
  • High-frequency antenna systems (e.g., microwave, satellite communications).
  • Environments with high electromagnetic interference (EMI).
  • Fixed installations requiring minimal signal loss and excellent shielding.
• LMR-100:
  • Low- to mid-frequency antenna systems (e.g., VHF/UHF, Wi-Fi, GPS).
  • Portable or mobile setups where flexibility is needed.
  • Short cable runs where higher attenuation is acceptable.

In general, RG405 is superior for high-frequency, high-performance applications, while LMR-100 is a cost-effective, flexible solution for lower-frequency and less demanding antenna cable installations.