Theoretical and Experimental Studies of Gain Compression of Millimeter-Wave Self-Oscillating Mixers

Dynamics of autodyne response formation in microwave generators

“…autodyne) combining functions of receiver and transmitter. Hence autodynes are attractive to a wide range of applications including various purpose short-range radars (SRR), equipment for controlling parameters of technological processes, radio-spectroscopy, communications and measuring equipment where the mentioned quality indicators are of essential importance [1][2][3][4][5].…”

“…These changes in FAC c n (2) impact the PAC d (3) at the next step, causing further increase of its slope on the first interval and appearance of opposite concavity segment on the second (graphs in row 7). As follows from the graphs of rows 8 and 9, these changes also impact the shape of AAC a n (3) and FAC c n (3) in the third impact region.…”

“…autodyne) combining functions of receiver and transmitter. Hence autodynes are attractive to a wide range of applications including various purpose short-range radars (SRR), equipment for controlling parameters of technological processes, radio-spectroscopy, communications and measuring equipment where the mentioned quality indicators are of essential importance [1][2][3][4][5].The operation principle of these devices is based on autodyne effect that consists in changes of auto-generator's oscillation parameters, such as amplitude and frequency as well as auto-bias voltage, caused by the impact of its own reflected radiation. Any of the mentioned low-frequency components of autodyne response may be used as a useful signal given the possibility to extract them in a number of different ways [1,[4][5][6].…”

“…The resulting autodyne changes of average current (or voltage) in the majority of applications get transformed into output signal's voltage u 0 [12,13,20] using resistor R or a special registration circuit in the AE power supply circuit. In some SRR low-frequency changes of oscillations amplitude are registered as output signal u 1 using an additional amplitude detector connected with AG [3]. Further the signal is subject to time processing, which results in obtaining a Doppler signal [8].…”

Frequency Deviation of Injection-Locked Microwave Autodynes

“…Owing to the constructive simplicity and low cost, such transceiver units are widely used as radar sensors in transport, industry, research, military purposes, and medicine [8], [10][11][12][13][14][15][16][17]. Therefore, the interest to studying 1 The terms like oscillator-detector [1], self-oscillating mixer (SOM) [2], self-mixing oscillator [3], self-detecting oscillator [4], selfexcited mixer [5], load variation detector [5], [6], homodyne detector [7] etc. are often used along with the widespread term of "autodyne" in the reference sources.…”