What is identified as the simplest and most frequently used type of detector in microwave receivers?

The simplest and most frequently used type of detector in microwave receivers is the diode detector. This device works by utilizing the non-linear characteristics of a diode to convert microwave signals into a corresponding DC voltage. This conversion is essential for processing the signal further, enabling the extraction of amplitude information from the received microwave signals.

Diode detectors are favored due to their straightforward design, ease of integration into circuits, and effectiveness across a wide range of frequencies, making them particularly suitable for various microwave applications. They are also capable of providing good sensitivity and can operate with low power consumption, which is valuable in microwave technology.

In contrast, other types of detectors, such as crystal detectors, phase detectors, and optical detectors, may be used in specific applications but are not as prevalent for general microwave receiving purposes. Crystal detectors have largely been replaced by diodes in most modern applications, while phase detectors are primarily used for phase comparison, and optical detectors are not relevant in the context of microwave frequencies.