GO Electronics
Login
Register
Dark Mode
Brightness
Profile
Edit Profile
Messages
My favorites
My Updates
Logout
Recent questions tagged antennas
0
votes
0
answers
1
GATE ECE 2016 Set 3 | Question: 54
A radar operating at $5\:GHz$ uses a common antenna for transmission and reception. The antenna has a gain of $150$ and is aligned for maximum directional radiation and reception to a target $1\:km$ away having radar cross-section of $3\:m^2$. If it transmits $100\:kW$, then the received power (in $\mu W)$ is _______
A radar operating at $5\:GHz$ uses a common antenna for transmission and reception. The antenna has a gain of $150$ and is aligned for maximum directional radiation and r...
Milicevic3306
16.0k
points
75
views
Milicevic3306
asked
Mar 27, 2018
Electromagnetics
gate2016-ec-3
numerical-answers
electromagnetics
antennas
+
–
0
votes
0
answers
2
GATE ECE 2016 Set 1 | Question: 52
An antenna pointing in a certain direction has a noise temperature of $50 \: K$. The ambient temperature is $290 \: K$. The antenna is connected to a pre-amplifier that has a noise figure of $2$ dB and an available gain of $40$ dB over an effective bandwidth of $12$ MHz. ... $T_e = 160.62\thinspace K$ and $P_{a0} = 4.6\times 10^{-10}W$
An antenna pointing in a certain direction has a noise temperature of $50 \: K$. The ambient temperature is $290 \: K$. The antenna is connected to a pre-amplifier that h...
Milicevic3306
16.0k
points
81
views
Milicevic3306
asked
Mar 27, 2018
Electromagnetics
gate2016-ec-1
electromagnetics
antennas
+
–
0
votes
0
answers
3
GATE ECE 2016 Set 1 | Question: 53
Two lossless X-band horn antennas are separated by a distance of $200 \lambda$. The amplitude reflection coefficients at the terminals of the transmitting and receiving antennas are $0.15$ and $0.18$,respectively. The maximum directives of ... are perfectly aligned and polarization matched, the power ( in mW) delivered to the load at the receiver is _________
Two lossless X-band horn antennas are separated by a distance of $200 \lambda$. The amplitude reflection coefficients at the terminals of the transmitting and receiving a...
Milicevic3306
16.0k
points
126
views
Milicevic3306
asked
Mar 27, 2018
Electromagnetics
gate2016-ec-1
numerical-answers
electromagnetics
antennas
+
–
0
votes
0
answers
4
GATE ECE 2016 Set 1 | Question: 55
The far-zone power density radiated by a helical antenna is approximated as: ${\overrightarrow W_{rad}= \overrightarrow W_{average} \approx \hat {a_r}C_0\frac{1}{r^2}\cos^4\theta}$ The radiated power density is symmetrical with respect to $\phi$ ... maximum directivity of the antenna, respectively, are $1.5C_0,10dB$ $1.256C_0,10dB$ $1.256C_0,12dB$ $1.5C_0,12dB$
The far-zone power density radiated by a helical antenna is approximated as:$${\overrightarrow W_{rad}= \overrightarrow W_{average} \approx \hat {a_r}C_0\frac{1}{r^2}\cos...
Milicevic3306
16.0k
points
93
views
Milicevic3306
asked
Mar 27, 2018
Electromagnetics
gate2016-ec-1
electromagnetics
antennas
+
–
0
votes
0
answers
5
GATE ECE 2015 Set 3 | Question: 24
The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements improves the radiation efficiency increases the effective area of the antenna results in a better impedance matching allows more power to be transmitted by the antenna
The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements improves the radiation efficiency increases the effec...
Milicevic3306
16.0k
points
82
views
Milicevic3306
asked
Mar 27, 2018
Electromagnetics
gate2015-ec-3
electromagnetics
antennas
+
–
0
votes
0
answers
6
GATE ECE 2012 | Question: 17
The radiation pattern of an antenna in spherical co-ordinates is given by $F(\theta)=\cos^4\theta\:\:\:;\:\:\:0\le \theta\le \frac{\pi}{2}$ The directivity of the antenna is $10\:dB$ $12.6\:dB$ $11.5\:dB$ $18\:dB$
The radiation pattern of an antenna in spherical co-ordinates is given by$$F(\theta)=\cos^4\theta\:\:\:;\:\:\:0\le \theta\le \frac{\pi}{2}$$The directivity of the antenna...
Milicevic3306
16.0k
points
68
views
Milicevic3306
asked
Mar 25, 2018
Electromagnetics
gate2012-ec
electromagnetics
antennas
+
–
0
votes
0
answers
7
GATE ECE 2017 Set 1 | Question: 55
A half wavelength dipole is kept in the $x-y$ plane and oriented along $45^{\circ}$ from the $x$-axis. Determine the direction of null in the radiation pattern for $0\leq \phi \leq \pi$. Here the angle $\theta (0\leq \theta \leq \pi )$ is measured from the $z$-axis and ... $\theta =45^{o},\phi =90^{o}$ $\theta =90^{o},\phi =135^{o}$ $\theta =45^{o},\phi =135^{o}$
A half wavelength dipole is kept in the $x-y$ plane and oriented along $45^{\circ}$ from the $x$-axis. Determine the direction of null in the radiation pattern for $0\leq...
admin
46.4k
points
157
views
admin
asked
Nov 17, 2017
Electromagnetics
gate2017-ec-1
antennas
electromagnetics
+
–
0
votes
0
answers
8
GATE ECE 2017 Set 1 | Question: 25
Consider a wireless communication link between a transmitter and a receiver located in free space, with finite and strictly positive capacity. If the effective areas of the transmitter and the receiver antennas, and the distance between them are all doubled, and ... factor of $2$ Decreases by a factor of $2$ Remains unchanged Decreases by a factor of $\sqrt{2}$
Consider a wireless communication link between a transmitter and a receiver located in free space, with finite and strictly positive capacity. If the effective areas of t...
admin
46.4k
points
146
views
admin
asked
Nov 17, 2017
Electromagnetics
gate2017-ec-1
antennas
electromagnetics
+
–
To see more, click for the
full list of questions
or
popular tags
.
GO Electronics
Email or Username
Show
Hide
Password
I forgot my password
Remember
Log in
Register