Answer / ravi durbha

First of all, any EM wave propagates through a medium with certain frequency and Antenna is a device which operates over band of frequencies. In most cases the dimension of the Antenna is governed by the longest operating wavelength.

Answer / chandra shekhar godiwal

Antenna Size -- lmda/4

lmda -- c/f

Antenna Size -- c/4f

Answer / ashish kashyap

Antenna dimension of EM wave depends on the range of
frequencies transmitted or received by the antenna.
So if we know the range of frequencies then
antenna size = 4*c*f
where c= velocity of light
f= lowest frequency of EM wave.

respected sir, I am Diptiranjan swain have already applied as IFFCO GET ONLINE FORM-2013.kindly,send me one set of previous year question paper.

0 Answers   IFFCO,

---

i want to question papers of section engineer post (rrb).please sent my mail id .my id is boobalaraja@ gmail.com

0 Answers   RRB,

---

3 flipflops are connected so that after 0 to 5 count occured next number is zero. So what is the counter?

0 Answers  

---

Explain why does all cellular networks have same shape of sim? Why is it designed in such a particular shape? Does it have any other shape?

0 Answers  

---

What is impulse response?

10 Answers  

---

How to identify how many states the ripple counter is having by looking at the figure as it can also have some invalid states?

0 Answers  

---

What is the advantage of scr?

0 Answers  

---

what is the importance of clock frequency in microprocessor?

3 Answers  

---

types of communication scheme in power plant ?

0 Answers   DVC,

---

A reflex klystron function as

11 Answers   Bhel,

---

Given a light which may blink at a random time. There are two players who has to press a button when light blinks. The person who gets 20 pts first is declared as winner. Design FSM for this gaming event.

0 Answers   Qualcomm,

---

What do you mean by the term "open" in OSI model?

6 Answers  

---