Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

50 OHM MICROSTRIP LINE DESIGN 2.45GHz

Status
Not open for further replies.

Trishool

Full Member level 1
Joined
Jul 12, 2001
Messages
97
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Himalayas.(mount K2)
Activity points
821
microstrip line calculator

Dear All,

I have an amplifier IC delievering about 27 to 30 dBm p1dB out put power , working at a center frequency of 2.45GHz ,I am using 1.6mm Thick FR4 PCB material, Please help me with.

1) does power output influences the microstrip line on the pcb.

2) Can anyone help me with the design of this microstrip line , its distance from the ground plane , width of the line for the said PCB material.

Best regards
Ts
 

dingjingfeng

Full Member level 4
Joined
Aug 12, 2005
Messages
190
Helped
17
Reputation
34
Reaction score
8
Trophy points
1,298
Activity points
2,243
50 ohm microstrip line

1)no
2)using line calculator in ads
 

Trishool

Full Member level 1
Joined
Jul 12, 2001
Messages
97
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Himalayas.(mount K2)
Activity points
821
50 ohm microstrip calculator

Hello guys , thanks for the reply , actually the microstrip calculator doesnt specify the distance of the ground plane layer, on the top away from the microstrip , can you help me with that . Please see the attached pic for more clearance.


Rgds
Ts
 

    V

    Points: 2
    Helpful Answer Positive Rating

Jos Brink

Member level 3
Joined
Jan 28, 2004
Messages
64
Helped
9
Reputation
18
Reaction score
2
Trophy points
1,288
Activity points
577
50 ohm microstripline

**broken link removed**

See page 12.
Design the transmission line so that the conductor is as close to the
ground plane as possible. This technique will couple the
transmission line tightly to the ground plane and help decouple it
from adjacent signals.
 

Trishool

Full Member level 1
Joined
Jul 12, 2001
Messages
97
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Himalayas.(mount K2)
Activity points
821
microstripline calculator

Dear all , thanks for valuable suggestions but my question that how far the top layer GND plane is to be placed from the microstrip line remains the same, as per above pic.


Rgds
Ts
 

khouly

Advanced Member level 5
Joined
Oct 20, 2003
Messages
2,368
Helped
461
Reputation
916
Reaction score
102
Trophy points
1,343
Location
EGYPT
Activity points
13,242
microstrip 50 ohm

man if u make the ground plan , this become a coplaner trnsmission line , and u need copalner calculator
check TXline of WMO , also in ADS usr the line calc to get the distanc
**broken link removed**


khouly
 

Azulykit

Advanced Member level 4
Joined
Feb 18, 2007
Messages
1,135
Helped
220
Reputation
438
Reaction score
113
Trophy points
1,343
Location
All over the Map.
Activity points
8,547
50ohm microstrip

There are a number of calculators available. Look up Polar's Si9000 as one choice.

Agilent has a free one called AppCAD or you might try to find txline.exe and as I recall it comes from Tonne.

There are also several good books on the subject. Waddel is one, Simon wrote another.

Just search on "impedance calculators" and a bunch of choices are available.



Here is one place to look: h**p://www.hp.woodshot.com/
 

vkalariya

Member level 1
Joined
Sep 19, 2007
Messages
37
Helped
9
Reputation
18
Reaction score
3
Trophy points
1,288
Activity points
1,482
microstrip calculator fr4

IN ADS tool>lincalc is used to calculate the microstrip line with electrical angle and the resistance. just enter the desired resistance and electrical length bita * length of line and you will have the width and length of line.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top