The E-field pattern of an antenna. independent of , varies as follows: 0° ≤ 0≤ 45° E = 45° < 0 ≤ 90° 90° < 0 ≤ 180° sol (a) What is the directivity of this antenna? (b) What is the radiation resistance of the antenna at 200 m from it if the field is equal to 10 V/m (rms) for 8 = 0° at that distance and the terminal current is 5 A (rms)? Prad = 21 de S² dø [* Sinode + 45° -Cose + Yo 100 sinode ] 180° ] = 2 *[-Cos45+ Coso - Co 180° ++Cs Po] 피 7 Prad = 0.54.289 2 D= ATT Umar 4T = = 3.684 Prad 0.54288 (21) When the field (b) ⇒ E = { 10 V/m 0 Prad = is equal to 10%/m, for 0-0: 00 45° 45°<8 $90° x10m Po°C 180° 45° [{ 180 El sins de + Elsimo do } der] Prad = r³ (0.54.289) (2) 90° 110/2 = 36,193 Prad=112 Rr = |Irms Rr →R, = 36,193 (Irms 36,193 = = 1,447.72 25 6.625
The E-field pattern of an antenna. independent of , varies as follows: 0° ≤ 0≤ 45° E = 45° < 0 ≤ 90° 90° < 0 ≤ 180° sol (a) What is the directivity of this antenna? (b) What is the radiation resistance of the antenna at 200 m from it if the field is equal to 10 V/m (rms) for 8 = 0° at that distance and the terminal current is 5 A (rms)? Prad = 21 de S² dø [* Sinode + 45° -Cose + Yo 100 sinode ] 180° ] = 2 *[-Cos45+ Coso - Co 180° ++Cs Po] 피 7 Prad = 0.54.289 2 D= ATT Umar 4T = = 3.684 Prad 0.54288 (21) When the field (b) ⇒ E = { 10 V/m 0 Prad = is equal to 10%/m, for 0-0: 00 45° 45°<8 $90° x10m Po°C 180° 45° [{ 180 El sins de + Elsimo do } der] Prad = r³ (0.54.289) (2) 90° 110/2 = 36,193 Prad=112 Rr = |Irms Rr →R, = 36,193 (Irms 36,193 = = 1,447.72 25 6.625
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Question
![The E-field pattern of an antenna. independent of , varies as follows:
0° ≤ 0≤ 45°
E =
45° < 0 ≤ 90°
90° < 0 ≤ 180°
sol
(a) What is the directivity of this antenna?
(b) What is the radiation resistance of the antenna at 200 m from it if the field is equal
to 10 V/m (rms) for 8 = 0° at that distance and the terminal current is 5 A (rms)?
Prad
=
21
de
S² dø [* Sinode +
45°
-Cose +
Yo
100 sinode ]
180°
]
= 2 *[-Cos45+ Coso - Co 180° ++Cs Po]
피
7
Prad = 0.54.289 2
D= ATT Umar
4T
=
= 3.684
Prad
0.54288 (21)
When the field
(b)
⇒ E =
{
10 V/m
0
Prad
=
is equal to 10%/m, for 0-0:
00 45°
45°<8 $90°
x10m Po°C 180°
45°
[{
180
El sins de + Elsimo do } der]
Prad = r³ (0.54.289) (2)
90°
110/2
= 36,193
Prad=112 Rr = |Irms Rr
→R, = 36,193
(Irms
36,193
=
= 1,447.72
25
6.625](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc01fe480-0eb1-4a9e-9261-8ec52fdc7bcc%2F1d741b44-2927-4065-88dd-873a417f2bd3%2Fkeptjce_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The E-field pattern of an antenna. independent of , varies as follows:
0° ≤ 0≤ 45°
E =
45° < 0 ≤ 90°
90° < 0 ≤ 180°
sol
(a) What is the directivity of this antenna?
(b) What is the radiation resistance of the antenna at 200 m from it if the field is equal
to 10 V/m (rms) for 8 = 0° at that distance and the terminal current is 5 A (rms)?
Prad
=
21
de
S² dø [* Sinode +
45°
-Cose +
Yo
100 sinode ]
180°
]
= 2 *[-Cos45+ Coso - Co 180° ++Cs Po]
피
7
Prad = 0.54.289 2
D= ATT Umar
4T
=
= 3.684
Prad
0.54288 (21)
When the field
(b)
⇒ E =
{
10 V/m
0
Prad
=
is equal to 10%/m, for 0-0:
00 45°
45°<8 $90°
x10m Po°C 180°
45°
[{
180
El sins de + Elsimo do } der]
Prad = r³ (0.54.289) (2)
90°
110/2
= 36,193
Prad=112 Rr = |Irms Rr
→R, = 36,193
(Irms
36,193
=
= 1,447.72
25
6.625
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