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  MICROWAVE MAY 2015- 2 MARKS

5. what is faraday rotation

A!S" rotation of a #$a% of &o'ari($d %i)rowa*$s tra*$rsin+ an isotro&i) %$di,%a'on+ th$

'in$s of for)$ of a %a+n$ti) $'d.

. A two )a*ity /'ystron o&$rat$s at 5 with a d) #$a% *o'ta+$ of 10KV and

)a*ity +rid +a& of 1.0%%. )a'),'at$ th$ d) #$a% s&$$d and th$ +a& transit ti%$ at

th$ #,n)h$r )a*ity.

A!S" 3h$ d) #$a% s&$$d40.5671087910000:891;2:

  45.67108< %;s

  3ransit ti%$49d;d) #$a% s&$$d:

  49108-6:;95.67108

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  2.fo'd$d #a)/ 'in$

  6.(i+ (a+ 'in$

  .)orr,+at$d wa*$ +,id$

  5.int$r di+ita' 'in$

10.writ$ th$ h,'' ),toF %a+n$ti) $G,ation for a %a+n$tron.

A!S" H04D9=V09%;$::81;2 ;D#91-9a82;#82::

11.what is %$ant #y +,n $F$)t

A!S" ,n $F$)t was rst o#s$r*$d #y !! in nJty&$ aAs #,'/ diod$. A))ordin+

to !!@ a#o*$ so%$ )riti)a' *o'ta+$ )orr$s&ondin+ to an $'$)tri) $'d of 2000-

000*;)%@ th$ ),rr$nt in $*$ry s&$)i%$n #$)a%$ a >,)t,atin+ f,)tion of ti%$. 3h$

fr$G,$n)y of os)i''ation was d$t$r%in$d %ain'y #y th$ s&$)i%$n and not #y th$$?t$rna' )ir),it.

1. M$ntion so%$ ad*anta+$s of t,nn$' diod$

A!S"V$ry hi+h s&$$d"  3h$ hi+h s&$$d of o&$ration %$ans that th$ t,nn$'diod$ )an #$ ,s$d for %i)rowa*$ R a&&'i)ations.

Bon+$*ity" St,di$s ha*$ #$$n ,nd$rta/$n of th$ t,nn$' diod$ and its&$rfor%an)$ has #$$n shown to r$%ain sta#'$ o*$r 'on+ &$riods of ti%$@ wh$r$

oth$r s$%i)ond,)tor d$*i)$s %ay ha*$ d$+rad$d.

1. what ar$ th$ #asi) %at$ria's ,s$d in th$ fa#ri)ation of MMIC

A!S" s,#strat$ %at$ria's@)ond,)tor %at$ria's@di$'$)tri) %at$ria's@r$sisti*$

%at$ria's.

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  5.$t)hin+ and &hoto r$sists

1. draw th$ #'o)/ dia+ra% for 'ow *swr %$as,r$%$nt

A!S"

20. writ$ th$ $?&r$ssion for %$as,rin+ att$n,ation in d#

A!S" L410'o+9I!;O3:d#