Waveguides are generally made of Bronze or Aluminium.

Bronze and aluminium are commonly used materials for constructing waveguides due to their desirable properties and characteristics. Let's delve into the reasons why these materials are preferred:

1. Electrical Conductivity:
- Bronze and aluminium possess good electrical conductivity, allowing them to efficiently conduct electromagnetic signals.
- Waveguides require materials with low electrical resistance to minimize energy losses during signal transmission.
- Both bronze and aluminium have high conductivities, ensuring efficient transmission and minimal signal degradation.

2. Mechanical Strength:
- Waveguides are often subjected to mechanical stresses and external forces.
- Bronze and aluminium exhibit excellent mechanical strength, allowing them to withstand these stresses without deformation or failure.
- These materials are known for their durability, making them suitable for various applications.

3. Corrosion Resistance:
- Waveguides are commonly used in outdoor or harsh environments where they may be exposed to moisture, chemicals, and other corrosive elements.
- Bronze and aluminium possess inherent corrosion resistance, ensuring the waveguides remain functional and durable even in corrosive conditions.
- Aluminium forms a protective oxide layer on its surface, preventing further corrosion and enhancing its longevity.

4. Lightweight:
- Waveguides are often used in applications where weight is a crucial factor, such as aerospace and defense.
- Both bronze and aluminium are lightweight materials, reducing the overall weight of the waveguide systems without compromising their structural integrity.

5. Machinability:
- Bronze and aluminium are easily machinable, allowing for the fabrication of complex waveguide designs with precise dimensions.
- Their machinability makes it convenient to manufacture waveguides with intricate shapes and sizes, catering to specific requirements.

In summary, bronze and aluminium are preferred materials for waveguides due to their excellent electrical conductivity, mechanical strength, corrosion resistance, lightweight nature, and machinability. These properties enable efficient signal transmission, durability, and versatility in various applications.