1. A short circuited stub
2. An open-circuited stub
3. A quarter-wav line
4. A half-wave line
A quarter-wav line
1. Directly proportional to its length
2. Inversely proportional to its length
3. Independent of its length
4. None of these
Independent of its length
1. ∇ x B = 0
2. ∇. B = 0
3. ∇ x B = ρ
4. ∇. B = ρ
∇. B = 0
1. More difficult to make and correct
2. Made of a transmission line with a different characteristic impedance
3. Liable to radiate
4. Incapable of giving a full range of reactances
Made of a transmission line with a different characteristic impedance
1. 0.8 πV
2. 0.4 πV
3. 0.2 πV
4. zero
0.8 πV
1. Circular polarization
2. Maneuverability
3. Broad bandwidth
4. Good front-to-back-ratio
Circular polarization
1. They travel along the broader walls of the guide
2. They are reflected from the walls but do not travel along them
3. They travel through the dielectric without touching the walls
4. They travel along all four walls of the waveguide
They are reflected from the walls but do not travel along them
1. ab B0 cos ωt
2. ab B0 sin ωt
3. B0 ω sin ωt
4. zero
ab B0 sin ωt
1. They depend on straight-line propagation which applies to microwaves only
2. Losses would be too heavy at lower frequencies
3. There are no generators powerful enough to excite them at lower frequencies
4. The would be too bulky at lower frequencies
The would be too bulky at lower frequencies
1. 80 ohms
2. 164 ohms
3. 36 ohms
4. 64 ohms
80 ohms