03.12.2000. TELEFILTER Application Note 140G Gener
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PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
General.
filter driven unbalanced way. matched matching element values given below theoretical calculations based measured values termination impedance, given specification -parameters filters PCB. there parasitics customer PCB, matching elements have optimised regarding circuit design. have tested (tft032) different versions matching network with shunt resistances.
Unbalanced matching.
have tested unbalanced matching networks with reactance elements with shunt resistance scheme calculation made with consideration parasitics. capacities C1par C2par used simulation parasitics effect (tft032) only. Theoretical matching. Scheme
values matching elements, which given below diagram, calculated 18.-19 with consideration -values 70.100 SMD-elements parasitics capacities C1par; C2par based measured S-parameters filter 140G.
C1par
C2par
Scheme Theoretical matching with
below table shows termination impedances input output insertion loss depend different Q-values matching elements with constant reactance part matching elements from above diagram
Input termination impedance ideal 186,60 -16,603 184,24 -16,567 183,47 -16,555 181,96 -16,530 180,06 -16,499 177,59 -16,456 172,16 -16,352 165,92 -16,218 R+jX 60,3 60,3 60,2 60,2 60,1 60,0 59,8 59,5 Output termination impedance 206,08 -12,090 203,92 -12,058 203,22 -12,047 201,82 -12,025 200,07 -11,997 197,79 -11,959 192,74 -11,868 186,90 -11,750 R+jX 35,5 77,8 35,9 77,7 36,0 77,6 36,3 77,5 36,7 77,4 37,1 77,2 38,2 76,8 39,5 76,3 -17,2 -17,6 -18,0 -18,2 -18,5 -18,9 -19,4 -19,9
22,1 22,4 22,5 22,7 23,0 23,3 24,1 25,1
next tables show matching elements depend different Q-value different parasitics capacities C1par C2par PCB. Simulated termination impedances constant input 16,5 output: 12,0
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Table C1par C2par Input matching values Output matching values Q-value ideal
112,2 113,4 113,8 114,6 115,7 117,2 120,9 126,1
131,4 130,2 129,8 129,0 127,9 126,5 123,3 119,3
Q-value ideal
122,8 123,9 124,2 125,0 126,0 127,3 130,7 135,3
221,6 218,5 217,5 215,5 213,0 209,6 202,1 193,1
Table const. Input matching values Output matching values C1par
Cpar2
Matching PCB. Scheme
matching networks test board (PCB tft032) tested with SMD-components with Q-value Matching elements values given below Scheme Filter next typical values with unbalanced scheme (typ.) 18,6.18,9 Group delay ripple 0,85 0,85 140.160 (p-p). Phase ripple 0,85 0,85 3°.4° (p-p). Triple transit signal 41.42 VSWR(S 0,85 0,85 VSWR(S 0,85 0,85 Filter response shown Appendix
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Theoretical matching. Scheme
values matching elements, which given below diagram, calculated -18.-19 with consideration -values 70.100 SMD-elements parasitics capacities C1par; C2par= based measured S-parameters filter 140G. 88,5
C1par
C2par
29,4
39,3
Scheme Theoretical matching with
below table shows termination impedances input output insertion loss depend different Q-values matching elements with constant reactance part matching elements from above diagram
Input termination impedance ideal 190,4 -16,771 186,6 -16,677 185,4 -16,645 183,0 -16,581 180,0 -16,499 176,3 -16,388 168,4 -16,126 160,0 -15,792 R+jX 60,2 60,1 60,1 60,1 60,1 60,1 60,0 59,9 Output termination impedance 208,2 -12,205 205,2 -12,134 204,2 -12,11 202,3 -12,062 200,0 -12,000 197,0 -11,917 190,6 -11,722 183,5 -11,475 R+jX 34,7 77,6 35,4 77,5 35,6 77,5 36,1 77,4 36,6 77,4 37,4 77,3 39,2 77,0 41,4 76,7 -17,2 -17,6 -18,0 -18,2 -18,5 -18,9 -19,4 -19,9
21,4 22,0 22,2 22,5 23,0 23,6 25,1 26,9
next tables show matching elements depend different Q-value different parasitics capacities C1par C2par PCB. Simulated termination impedances constant input 16,5 output: 12,0 Table C1par C2par Input matching values Output matching values Q-value ideal
36,83 37,66 37,95 38,53 39,31 40,40 43,16 47,15
89,59 89,22 89,10 88,85 88,52 88,07 86,99 85,57
Q-value ideal
27,67 28,27 28,47 28,89 29,44 30,20 32,11 34,81
110,67 110,41 110,33 110,15 109,91 109,58 108,77 107,66
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Table const. Input matching values Output matching values C1par
36,5 37,1 37,6 38,2 38,8 39,3 39,9 40,4 41,0 41,5
92,5 91,7 90,9 90,1 89,3 88,5 87,8 87,0 86,3 85,5
Cpar2
26,2 26,8 27,5 28,2 28,8 29,4 30,1 30,7 31,3 32,0
115,7 114,5 113,3 112,2 111,0 109,9 108,8 107,7 106,6 105,5
Matching PCB. Scheme
matching networks test board (PCB tft032) tested with SMD-components with Q-value Matching elements values given below Scheme PCB-2
Filter next typical values with unbalanced scheme (typ.) 18,6.18,9 Group delay ripple 0,85 0,85 160.180 (p-p). Phase ripple 0,85 0,85 3°.4,6° (p-p). Triple transit signal 40,5.41,5 VSWR(S 0,85 0,85 VSWR(S 0,85 0,85 Filter response shown Appendix
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Commentary.
matching networks does slightly differs from theoretical matching. reasons that parasitics parallel capacities C1par C2par serial inductors microstrip board tft032 particularly differences Q-value matching components. parasitics customer board (mentioned parasitics, additional parasitics active parts) different this (tft032), matching elements will have slightly adjusted. Both line shunt elements will change both pass band shape (tilt, concave, convex) insertion loss ILo.
Details.
Insertion loss depends much parallel matching elements, Q-value matching elements parasitics capacities board (PCB). Pass band shape characteristic tilt pass band depends much series elements schemes Both each side input output have adjusted your board design. Insertion loss, group delay ripple return loss depend shunt resistances parallel matching elements: scheme scheme
Comparison matching schemes:
Electrical characteristics filter 140G equals matching networks. Scheme with parallel capacities have better selection compared with schemes with parallel inductors Scheme more stable filter characteristic pass band, than scheme because relative accuracy (tolerance) matching series elements scheme larger element L1,2 element L3,4 than scheme element L1,2 element C1,2 Shunt resistances used improve VSWR( S11,
Additional note.
send filter sample 140G (tft032) according your requirements scheme
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Appendix Measured data 140G with unbalanced scheme
Scheme
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Appendix Measured data 140G with unbalanced scheme
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Appendix Measure data 140G with unbalanced scheme
Scheme PCB-2
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
PCB: tft032
03.12.2000.
TELEFILTER
Application Note
140G
Appendix Measured data 140G with unbalanced scheme
TELEFILTER Potsdamer TELTOW Germany Tel: (+49) 3328 4784-0 Fax: (+49) 3328 4784-30 E-mail: tft@telefilter.com
Vectron International, Inc. Lowell Road Hudson, 03051 Phone: (603) 598-0070 Fax: (603) 598-0075 e-mail: vti@vtinh.com
TELEFILTER reserves right make changes product(s) and/or information contained herein without notice. liability assumed result their application. rights under patent accompany sale such product(s) information.
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