Answer / syedmsd84

horn antenna is used for the transmission and reception of
microwave signals. It derives its name from the
characteristic flared appearance. The flared portion can be
square, rectangular, or conical. The maximum radiation and
response corresponds with the axis of the horn. In this
respect, the antenna resembles an acoustic horn. It is
usually fed with a waveguide.



In order to function properly, a horn antenna must be a
certain minimum size relative to the wavelength of the
incoming or outgoing electromagnetic field. If the horn is
too small or the wavelength is too large (the frequency is
too low), the antenna will not work efficiently.

Horn antennas are commonly used as the active element in a
dish antenna. The horn is pointed toward the center of the
dish reflector. The use of a horn, rather than a dipole
antenna or any other type of antenna, at the focal point of
the dish minimizes loss of energy (leakage) around the
edges of the dish reflector. It also minimizes the response
of the antenna to unwanted signals not in the favored
direction of the dish.

Horn antennas are used all by themselves in short-range
radar systems, particularly those used by law-enforcement
personnel to measure the speeds of approaching or
retreating vehicles.

Answer / lodhi

In horn antenna ,flared waveguide
in case of normal waveguide ,there is a problem of
impedance mismatching ,due to this there is a loss of signal
but due to flared waveguide this problem is reduced...

What do you mean by a grounded load?

0 Answers  

---

74Ls244 is _____?

0 Answers  

---

What is the weight per meter (Kg/m)of 0.5mm dia copper 10 pair,50 pair and 100 pair,200 pair,500pair telephone cables?

0 Answers  

---

The whole thing moves/ (B) around the concept of building a small dynamic/(C) organisation into a larger one./(D) No error.

3 Answers   Accenture, AMCAT, Aspiring Minds, CTS, HCL, Wipro,

---

A half wave rectifier is used to supply 50vdc to resistive load of 800ohms the semiconductor diode has a forword resistance of 25ohms,calculate ac voltage required?

1 Answers   TCS,

---

IN AN OSCILLOSCOPE TWO COUPLING IS THERE, THAT IS AC & DC COUPLING, WHERE DO WE USE THESE COUPLINGS ?

2 Answers   DRDO, VH,

---

Respected sir, I am a student of ECE stream i need effectronics placement papers where i get those papers? can you please send me the information to my mail id? which is kamakshigudi@gmail.com

0 Answers   Efftronics Systems,

---

What is an extended cell? How does it impact the system? Channels and TDMA structure

1 Answers  

---

Which modulation we use in case of GPRS?

1 Answers   JAZ, NSN,

---

Explain how to convert design gray to binary code?

0 Answers  

---

96 The high-frequency response in RC active filters using op-amp is due to A BW B Gain C Gain,BW product D High frequency

1 Answers  

---

wht is charging gateway protocol wht is it functio

0 Answers   ZTE,

---