X-band resistive sensor for high-power microwave pulse measurement with flat frequency response

Interaction of semiconductor sample with TE₁₀ mode in double ridged waveguide

“…The above-described procedure has been used for the calculation of sensitivity of the RS in a rectangular waveguide. A good coincidence between the measured and calculated values obtained in [3,4,6] allows us to hope that analogous calculations for the RS in a double ridged waveguide will also give reliable results.…”

“…Several types of RSs with a flat frequency response in the rectangular waveguide have been designed and realised: the cross-waveguide type RS with the SE the height of which is equal to the narrow wall of the waveguide [2], the RS with a diaphragm where the SE is placed between a thin metal foil and the wide wall of the waveguide [3,4], and the RS with two sensing elements the height of which is much less than the narrow wall of the waveguide [5,6]. The main disadvantage of the waveguide type RS is a narrow frequency range where the particular sensor can be used.…”

Wide band waveguide sensor for microwave pulse measurement

“…Three different samples of the RS have been measured using the above-described meander modulated microwave signal and lock-in amplifier technique. The sensitivity values calculated according to (3) were averaged and are shown in Fig. 4 together with error bars.…”

“…Šiame darbe ištirtos tokio jutiklio jautrio priklausomybė nuo dažnio bei išėjimo signalo priklausomybė nuo mikrobangų impulso galios. Jutiklis buvo pagamintas iš 10 Ω cm savitosios varžos n-Si, jo matmenys -h × w × l = 3,8 × 1 × 1 mm 3 , o varža -400 Ω. Kaip parodyta 1 pav., strypelio pavidalo bandinys buvo talpinamas H tipo bangolaidžio centre tarp metalo strypų, praplečiančių bangolaidžio dažnių ruožą. Jutiklio signalo priklausomybė nuo mikrobangų impulso galios buvo išmatuota naudojant magnetroninius generatorius S (2.75 GHz) ir C (5.7 GHz) dažnių ruožuose.…”

“…The electric field of the microwave pulse heats electrons in the SE, its resistance increases, and by measuring this resistance change the microwave pulse power in the waveguide is determined [1]. Although the characteristics of a waveguide type RS were improved significantly devoting special attention to its frequency response [2,3], the main disadvantage of the RS is a narrow frequency range limited by the pass-band of the rectangular waveguide.…”