When choosing a suitable flexible waveguide, length, bending radius, and stress analysis are key factors. The following will discuss in detail how to choose a suitable soft waveguide from these three aspects.
1. Selection of length
The length of the flexible waveguide directly affects its performance and application effect. A flexible waveguide that is too long may cause the mass of the suspended part to be too large, thereby increasing stress and even causing the risk of fracture. Therefore, the waveguide length should be shortened as much as possible during design, and fixing measures should be added at necessary positions to reduce the suspended length. In addition, the length of the soft waveguide should also be optimized according to the specific application scenario. For example, in satellite communications, soft waveguides are usually used to connect feed sources and antennas, and their length must meet the requirements of electromagnetic compatibility and mechanical strength.
2. Selection of bending radius
The bending radius is one of the important parameters in the design of flexible waveguides. Too small a bending radius will cause greater stress inside the waveguide, which will affect its service life and performance. According to research, the minimum bending radius of the flexible waveguide should be greater than twice the lowest wavelength of the target frequency. For example, the flexible waveguide products produced by Pasternack have a minimum bending radius of 1 inch and 2 inches in the E plane and H plane respectively. This design ensures its high performance in high bending and high torsion configurations. In addition, the torsion angle of the waveguide also needs to be reasonably controlled to avoid performance degradation caused by excessive torsion.
3. Stress analysis
Flexible waveguides are affected by various stresses during use, including bending stress, tensile stress, and compressive stress. Stress analysis is an indispensable step in ensuring the safety and reliability of flexible waveguides. Studies have shown that under the same load conditions, flexible waveguides with larger cross-sectional dimensions have smaller stresses. Therefore, under the premise of meeting the electrical performance requirements, waveguides with larger cross-sectional dimensions should be preferred. In addition, the mechanical properties of flexible waveguides are also closely related to their materials. For example, flexible waveguides with silicone rubber sheaths have high flexibility and environmental resistance and can remain stable in complex environments.
Summary
Selecting a suitable flexible waveguide requires comprehensive consideration of factors such as length, bending radius, and stress analysis. In practical applications, the length and bending radius of the waveguide should be reasonably designed according to specific needs, and its safety and reliability should be ensured through stress analysis. Through scientific design and optimization, flexible waveguides can play an important role in complex environments and meet the needs of various application scenarios.
Reference:
1. Microwave Journal China
2. MICROWAVE TRANSMISSION CIRCUITS. GEORGE L. RAGAN et al.
3. Hose Fittings Swaging Guidelines and Technical Information. Schwer Fittings.
[2016-06-01]