Merge pull request #7 from virtual-labs/dev

Push Update

Author: jnipun1994

experiment/aim.md

@@ -1,2 +1 @@
-
-####  To study the characteristics of multi-hole directional coupler by measuring the following parameters: coupling factor and directivity of coupler.
+####  To study the Characteristics of Directional Coupler.

experiment/contributors.md

@@ -5,9 +5,9 @@
 | :---: | :---: | :---: | :---: | :---: |
 | 1 | Prof. RS Anand | anandfee@gmail.com | IIT Roorkee | Professor |
 
-### Person Associated in the Lab Developement
+### Person Associated in the Lab Development
 | SNo. | Name | Email | Institute | Position |
 | :--- | :--- | :--- | :--- | :--- |
 | 1 | Rajeev Kumar | rajeevkumar.rke@gmail.com | IIT Roorkee | Senior Research Fellow |
 | 2 | Pragya Daksh | prgdaksh@gmail.com | IIT Roorkee | Project Associate |
-| 3 | Nipun jain | nipunjain1305@gmail.com | IIT Roorkee | Project Associate |
+| 3 | Nipun Jain | nipunjain1305@gmail.com | IIT Roorkee | Project Associate |

experiment/details.json

@@ -2,7 +2,7 @@
 
    "details": [
        {
-			"Experiment": "To Study the Characteristics of Multi-hole Directional Coupler by Measuring the Following Parameters: Coupling Factor and Directivity of Coupler.",     
+			"Experiment": "Directional Coupler Characteristics",     
 			"Lab": "Microwave Engineering",               
 			"Discipline": "",				 
 			"Technology": "HTML, JavaScript, CSS"         
@@ -17,28 +17,28 @@
        }
    ],
 
-   "contributer": [
+   "contributor": [
 
        {       
-			"Contributer": "Rajeev Kumar",              
+			"Contributor": "Rajeev Kumar",              
       "Institute": "Indian Institute of Technology Roorkee, Roorkee",               
 			"InstituteAcronym": "IITR"         
        },
 
        {       
-			"Contributer": "Nipun Jain",             
+			"Contributor": "Nipun Jain",             
       "Institute": "Indian Institute of Technology Roorkee, Roorkee",               
 			"InstituteAcronym": "IITR"         
        },
 
        {       
-			"Contributer": "Piyush Rawat",             
+			"Contributor": "Piyush Rawat",             
       "Institute": "Indian Institute of Technology Roorkee, Roorkee",               
 			"InstituteAcronym": "IITR"         
        },
 
        {       
-      "Contributer": "Pragya Daksh",             
+      "Contributor": "Pragya Daksh",             
       "Institute": "Indian Institute of Technology Roorkee, Roorkee",               
       "InstituteAcronym": "IITR"         
        }

experiment/experiment-name.md

@@ -1 +1 @@
-## To Study the Characteristics of Multi-hole Directional Coupler by Measuring the Following Parameters: Coupling Factor and Directivity of Coupler. 
+## Directional Coupler Characteristics. 

experiment/postest.md

@@ -26,12 +26,12 @@ C   back end of the primary
 <b>D   back end of the secondary</b>  
 <br>
 
-Q4. How high a frequency can transistor generate?<br>
+Q4.For coupled line coupler, if the voltage coupling factor is 0.1 and the characteristic impedance of the microstrip line is 50 Ω, even mode characteristic impedance is-<br>
 
-<b>A   above 10 GHz</b>  
-B   above 5 GHz  
-C   above 2 GHz    
-D   above 7.8 GHz  
+A 50.23 Ω  
+<b>B 55.28 Ω</b>  
+C 100 Ω   
+D 80.8 Ω  
 <br>
 
 Q5. Coupling factor of a directional coupler must be maximum and is a key factor that determines the performance of the coupler.<br>

experiment/posttest.json

@@ -1,6 +1,6 @@
 [{"question":"The main disadvantage of the two hole directional coupler is","answers":{"a":"low directional coupling","b":"poor directivity","c":"high standing wave ratio","d":"narrow bandwidth"},"correctAnswer":"d"},
 {"question":"In a directional coupler","answers":{"a":"isolation (dB) equals coupling plus directivity","b":"coupling (dB) equals isolation plus directivity","c":"directivity (dB) equals isolation plus coupling","d":"isolation (dB) equals (coupling) (directivity)"},"correctAnswer":"a"},
 {"question":"Where is the resistive load placed in a directional coupler?","answers":{"a":"front end of the primary","b":"front end of the secondary","c":"back end of the primary","d":"back end of the secondary"},"correctAnswer":"d"},
-{"question":"How high a frequency can transistor generate?","answers":{"a":"above 10 GHz","b":"above 5 GHz","c":"above 2 GHz","d":"above 7.8 GHz"},"correctAnswer":"a"},
+{"question":"For coupled line coupler, if the voltage coupling factor is 0.1 and the characteristic impedance of the microstrip line is 50 Ω, even mode characteristic impedance is-","answers":{"a":"50.23 Ω","b":"55.28 Ω","c":"100 Ω","d":"80.8 Ω"},"correctAnswer":"b"},
 {"question":"Coupling factor of a directional coupler must be maximum and is a key factor that determines the performance of the coupler.","answers":{"a":"True","b":"False"},"correctAnswer":"a"}]
 

experiment/pretest.json

@@ -1,5 +1,5 @@
-[{"question":"What are limits of microwaves?","answers":{"a":"1 – 25,000 GHz","b":"1 – 50,000 GHz","c":"1 – 75,000 GHz","d":"1 – 100,000 GHz"},"correctAnswer":"d"},
-{"question":"How much must a waveguide be?","answers":{"a":"over a half-wave","b":"over a quarter-wave","c":"over a wavelength","d":"over three-fourths of a wavelength"},"correctAnswer":"a"},
-{"question":"Which microwave tube has a repeller?","answers":{"a":"TWT","b":"Klystron","c":"Magnetron","d":"BWO"},"correctAnswer":"b"},
-{"question":"________ is the main advantage of a microwave.","answers":{"a":"frequency multiplier","b":"Moves at the speed of light","c":"Highly directive","d":"High penetration power"},"correctAnswer":"c"},
-{"question":"______ principle does Klystron operates","answers":{"a":"Velocity Modulation","b":"Pulse Modulation","c":"Frequency Modulation","d":"Amplitude Modulation"},"correctAnswer":"a"}]
+[{"question":"The number of ports in Directional Coupler are","answers":{"a":"One","b":"Two","c":"Three","d":"Four"},"correctAnswer":"d"},
+{"question":"An ideal directional coupler has _______ directivity, and _______ insertion loss.","answers":{"a":"Infinity, Zero","b":"Zero, Zero ","c":"Infinity, Infinity","d":"Zero, Infinity"},"correctAnswer":"c"},
+{"question":"In coupled line directional couplers, power from one line to another is transmitted through a microstrip line running between them.","answers":{"a":"True","b":"False"},"correctAnswer":"b"},
+{"question":"The addition of more holes to a two-hole directional coupler leads to better ________ range and directivity.","answers":{"a":"Distance","b":"Sensitivity","c":"Frequency","d":"Dynamic"},"correctAnswer":"c"},
+{"question":"The output power at the isolated port of a directional coupler is zero.","answers":{"a":"True","b":"False"},"correctAnswer":"a"}]

experiment/pretest.md

@@ -2,46 +2,43 @@
 #### Please attempt the following questions
 
 
-Q1. What are limits of microwaves?<br>
+Q1. The number of ports in Directional Coupler are<br>
 
-A   1 – 25,000 GHz  
-B   1 – 50,000 GHz  
-C   1 – 75,000 GHz  
-<b>D   1 – 100,000 GHz</b>   
+A One 
+B Two  
+C Three  
+<b>D Four</b>   
 <br>
 
 
-Q2. How much must a waveguide be?<br>
+Q2. An ideal directional coupler has _______ directivity, and _______ insertion loss.<br>
 
-<b>A   over a half-wave</b>  
-B   over a quarter-wave  
-C   over a wavelength  
-D   over three-fourths of a wavelength  
+A Infinity, Zero  
+B Zero, Zero  
+<b>C Infinity, Infinity</b> 
+D Zero, Infinity  
 <br>
 
 
-Q3. Which microwave tube has a repeller?<br>
+Q3. In coupled line directional couplers, power from one line to another is transmitted through a microstrip line running between them.<br>
 
-A   TWT   
-<b>B   Klystron</b>   
-C   Magnetron  
-D   BWO  
+A True   
+<b>B False</b>     
 <br>  
 
 
-Q4. \_\_\_\_\_\_\_\_ is the main advantage of a microwave.<br>
+Q4. The addition of more holes to a two-hole directional coupler leads to better ________ range and directivity.<br>
 
-A   Frequency multiplier  
-B   Moves at the speed of light  
-<b>C   Highly directive</b>  
-D   High penetration power  
+A Distance  
+B Sensitivity  
+<b>C Frequency</b>  
+D Dynamic  
 <br>
 
 
-Q5. \_\_\_\_\_\_ principle does Klystron operates<br>
+Q5. The output power at the isolated port of a directional coupler is zero.<br>
+
+<b>A True</b>  
+B False  
 
-<b>A   Velocity Modulation</b>  
-B   Pulse Modulation  
-C   Frequency Modulation  
-D   Amplitude Modulation
 

experiment/references.md

@@ -1,5 +1,5 @@
-1. D M Pozar, "Microwave Engineering", John Wiley & Sons, 3rd Ed. 2012.    
-2. Annapurna Das, Sisir Das, "Microwave Engineering", Tata McGraw-Hill Education, 2000.     
-3. Michael Steer, "Microwave and RF Design", Scitech Publishing, 2nd Ed. 2013.  
+1. D M Pozar, "Microwave Engineering", John Wiley & Sons, 3<sup>rd</sup> Ed. 2012.  
+2. Annapurna Das, Sisir Das, "Microwave Engineering", Tata McGraw-Hill Education, 2000.  
+3. Michael Steer, "Microwave and RF Design", Scitech Publishing, 2<sup>nd</sup> Ed. 2013. 
 4. Thomas H. Lee, "Planar Microwave Engineering", Cambridge University Press, 2004.  
-5. Directional coupler characteristics - https://www.youtube.com/watch?v=8lOV4dgWyi4
+