If the wave number of an EM wave is 301/m in air , then the propagation constant β on a micro strip line with effective di electric constant 2.8 is:

With an increase in the operating frequency of a micro strip line, the effective di electric constant of a micro strip line:

A

Increases

B

Decreases

C

Independent of frequency

D

Depends on the material of the substrate used as the microstrip line

The effective dielectric constant of a micro strip line is 2.4, then the phase velocity in the micro strip line is given by:

A

1.5*108 m/s

B

1.936*108 m/s

C

3*108 m/s

D

None of the mentioned

The wave number in air for EM wave propagating on a micro strip line operating at 10GHz is given by:

A

200

B

211

C

312

D

209

The effective di electric constant of a micro strip line with relative permittivity being equal to 2.6, with a width of 5mm and thickness equal to 8mm is given by:

A

2.6

B

1.97

C

1

D

2.43

In case of “U” channel/ section, the length of travel of the edge of the strip (effective length of the strip) ‘s’, travelling in a helical pattern having initial length ‘l’ is given by_____

A

l2 = s2 + c2

B

c2 = l2 + s2

C

s2 = l2 + c2

D

s = l2 + c2

The higher order wave guide modes of propagation can be avoided in a strip line by:

A

Restricting both the ground plate spacing and the sidewall width to less than λd/2

B

Restricting both the ground facing plate spacing and the sidewall width to less than λd

C

Filling the region between 2 plates with di electric

D

Restricting both the ground plate spacing and the sidewall width between λg and λg/2

Expression for propagation constant β of a strip line is:

A

ω(√µ∈∈r)

B

ω(√µₒ/√∈r)

C

ω/(√µₒ∈ₒ∈r)

D

c/(√µₒ∈ₒ∈r)

Given are the steps to draw a perpendicular to a line at a point within the line when the point is near the centre of a line. Arrange the steps. Let AB be the line and P be the point in it i. P as centre, take convenient radius R1 and draw arcs on the two sides of P on the line at C, D. ii. Join E and P iii. The line EP is perpendicular to AB iv. Then from C, D as centre, take R2 radius (greater than R1), draw arcs which cut at E.

A

i, iv, ii, iii

B

iii, ii, iv, i

C

iv, iii, i, ii

D

ii, i, iv, iii

If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are

A

3.0 m and 1.5 m

B

1.5 m and 3.0 m

C

3.0 m and 3.0 m

D

1.5 m and 1.5 m

In which of the following a strip of definite width and of length suitable for studying vegetation is marked out and plotted, then plants occurring along the strip are recorded?

A

Line transect

B

Belt transect

C

Chart quadrat

D

Experimental quadrat