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WorksheetsRF Lab
Total questions: 20
Worksheet time: 10mins
In link budget analysis, the path loss depends primarily on:
Frequency and distance between antennas
Noise figure of the receiver
Antenna impedance only
Transmit power and modulation
The EMPro tool mainly solves electromagnetic fields using:
Circuit-level analysis
Finite Element Method (FEM) and Finite Difference Time Domain (FDTD)
Fourier transforms
Laplace transforms
The S₁₁ parameter in ADS represents:
Power gain of the amplifier
Output isolation
Input reflection coefficient
Transmission coefficient
The effective dielectric constant of a microstrip structure affects:
Propagation velocity and resonant frequency
Power gain
Antenna impedance only
Signal modulation index
In ADS, which parameter file is often used to represent S-parameters?
.net
.csv
.s2p
.txt
The main goal of impedance matching is to:
Improve bandwidth
Minimize thermal noise
Reduce power loss due to reflections
Increase output voltage
Link budget analysis is used to:
Determine total system noise
Evaluate total power gain/loss from transmitter to receiver
Design matching networks
Compute antenna impedance
LoRa modulation is based on:
Amplitude Shift Keying
Frequency Hopping Spread Spectrum
Chirp Spread Spectrum
Direct Sequence Spread Spectrum
ZigBee operates typically in which frequency band?
433 MHz
5.8 GHz
900 MHz
2.4 GHz
Which parameter is commonly extracted from a ring resonator simulation?
VSWR
Q-factor
Gain
Noise figure
The resonant frequency of a microstrip ring resonator depends mainly on:
Substrate conductivity
Ring circumference and effective dielectric constant
Power input
Ground plane roughness
The radiation pattern of a dipole antenna is:
Omni-directional in azimuth plane
Directional with a narrow beamwidth
Isotropic
Highly focused in one direction
A monopole antenna is typically mounted over:
An insulator
A ground plane
A reflector plate
A dielectric lens
EMPro software is mainly used for:
Electromagnetic 3D simulation
Circuit-level SPICE simulation
PCB routing
Logic synthesis
The noise figure (NF) of an LNA represents:
Power gain
Signal distortion
Degradation of SNR due to the amplifier
Phase noise level
Low Noise Amplifiers (LNAs) are used in RF systems to:
Reduce bandwidth
Match impedance
Filter unwanted harmonics
Amplify weak signals with minimal added noise
In antenna array design, the element spacing affects:
Only input impedance
Only output impedance
Array directivity and beam pattern
DC biasing
An antenna array improves:
Bandwidth only
Directionality and gain
Impedance matching
Polarization purity only
Which type of power divider provides equal power split with isolation between output ports?
Wilkinson power divider
Resistive divider
Branch-line coupler
Hybrid ring
The main purpose of a power divider is to:
Combine two signals
Split a signal into multiple paths with defined ratios
Amplify the input signal
Match impedance between ports
