NEW
Font size
Worksheetsmicrowave Filters
Total questions: 20
Worksheet time: 10mins
Calculate the values of Inductance L and Capacitance C for Constant K section filters for Ro = 75 ohm and frequency of 2 MHz
2.122 µH and 11.94 nF
2.122 nH and 11.94 µF
11.94 µH and 2.122nF
11.94 nH and 2.122 µF
A perfect filter would have
Zero insertion loss in the passband
Zero attenuation in the stopband
Infinite insertion loss in the passband
Linear phase response in the passband
In case of Filter design , The quality factor provides important insight about
The operating frequency of resonator
The gain of resonator circuit
The losses generated in the resonator circuit
Filters don’t need quality factor to be defined
Consider Design of a LP composite filter using image parameter method with a cutoff frequency of 2MHz and impedance of 75 Ω. Place the infinite pole at 2.05 MHz. The value of 'm' used in the m-derived filter section is,
0.4195
0.5195
0.3195
0.2195
Load impedance is given Zl=75+j25 ohm. Calculate the normalized load impedance reflection coefficient ,reflection loss and SWR for characteristic impedance Z0=50 ohm.
Zl=1, Г=0, RLdB=infinity, SWR=1
Zl=0.97, Г=-0.015, RLdB=36.3, SWR=1.031
Zl=1.5+j0.5, Г=0.23+j0.15, RLdB=11.1, SWR=1.71
Zl=0.2-j0.1, Г=-0.66-j0.14, RLdB=3.5, SWR=5.051
The wave impedance of the waveguide is
Imaginary for propagating modes
Real for propagating modes
Real for evanescent modes
Unity
Which filter has ripples either in passband or stopband
Elliptic Filter
Maximally flat filter
Chebyshev Filter
Butterworth Filter
Shape factor of RF filter practically lies between……
-1 to 1
1 to ∞
-∞ to ∞
0 to 1
The resonant frequency of m-derived low pass filter in terms of the cut-off frequency of low pass filter is?
fc/√(1-m^2 )
fc/√(1+m^2 )
fc/(π√(1-m^2 ))
fc/(π√(1+m^2 ))
Given a m-derived low pass filter has cut-off frequency 1 kHz, design impedance of 400Ω and the resonant frequency of 1100 Hz. Find the value of k.
400
1000
1100
2100
For reciprocal network which of the following condition need to be satisfied ?
AB-CD=0
AD-BC=0
AD-BC=1
AB-CD=1
A filter which attenuates all frequencies below a designated cut-off frequency fc and passes all other frequencies greater than fc is called?
band elimination filter
band pass filter
low pass filter
high pass filter
The cut-off frequency of the constant k-low pass filter is?
1/√LC
1/(π√LC)
√LC
π√LC
Consider Design of a 3rd order HighPass butterworth Filter with cut-off frequency is 1 GHz and characteristics impedance is 50 Ω. If the Low pass prototype elements value are given as g0 = 1; g1 = 1; g2 = 2; g3 = 1; g4 = 1. Then the value of capacitor used in the final design is (consider series inductor as first element in LowPass prototype)
3.9789 μF
3.183 μF
3.9789 pF
3.183 pF
A two port network is represented by its ABCD parameters, is matched with its image impedances at both the ends. What is the relation between its image impedances Zi1 and Zi2 ? (where Zi1 and Zi2 are image impedance at port 1 and port2 respectively)
Zi2 = Zi1
Zi2 = (DZi1)/A
Zi1 = (DZi2)/A
Zi2 = (AZi1)/D
According to Richard’s transformation,
Inductor can be realized using λ/4 short circuited transmission line at ω = ωc and Capacitor can be realized using λ/4 open circuited transmission line at ω = ωc.
Inductor can be realized using λ/8 short circuited transmission line at ω = ωc and Capacitor can be realized using λ/8 open circuited transmission line at ω = ωc.
Inductor can be realized using λ/4 open circuited transmission line at ω = ωc and Capacitor can be realized using λ/4 short circuited transmission line at ω = ωc.
Inductor can be realized using λ/8 open circuited transmission line at ω = ωc and Capacitor can be realized using λ/8 short circuited transmission line at ω = ωc.
For a LPF with a cutoff frequency 3 GHz, equi ripple 0.5 dB, and a rejection of atleast 40dB at approximately twice the cutoff frequency. The order of the filter is_______
4
5
6
7
Which of the following is/are correct regarding the four Kuroda's Identities, 1. It is used to physically separate transmission line stubs. 2. It is used to transform series stubs into shunt stubs and vice versa. 3. It is used to change impractical characteristic impedances into more realizable values.
1 and 2 are correct
1 and 3 are correct
2 and 3 are correct
1, 2 and 3 are correct
The maximally flat and equal -ripple response have monotonically increasing attenuation in the stop band
linear phase function
Elliptical function
equi ripple
maximally flat
Load impedance is given Zl=75+j25 ohm. Calculate the normalized load impedance reflection coefficient ,reflection loss and SWR for characteristic impedance Z0=50 ohm.
Zl=1, Г=0, RLdB=infinity, SWR=1
Zl=0.97, Г=-0.015, RLdB=36.3, SWR=1.031
Zl=1.5+j0.5, Г=0.23+j0.15, RLdB=11.1, SWR=1.71
Zl=0.2-j0.1, Г=-0.66-j0.14, RLdB=3.5, SWR=5.051
