Andrew Telecommunications Pvt Ltd. Supplies Rectangular Waveguide for Standard and Low VSWR Applications. Andrew Telecommunications Pvt Ltd. Supplies solutions that serve traditional wireless networks, third generation technologies, triple-play [voice, data, and video] services, and specialized applications for microwave communications systems. The Rectangular Waveguide for Standard and Low VSWR Applications cover the entire recommended frequency ranges, while low VSWR components are generally only available over narrow Frequency ranges. The corrugated copper walls give rectangular waveguide excellent crush strength and good flexibility.