Gw-instek GRF-3300 Series Teacher Manual User Manual

16 Microstrip Line Filters 3309 16 MICROSTRIP LINE FILTERS PLLDe-ModModReceiverTransmitterModulatorMixerPre-AmplifierAttenuatorPowerAmplifierPhase

GRF-3300 Manual 3318 Let’s start from the Zl sections which are capacitor sections including g1, g3, g5 and g7. By using the microstrip line calcula

16 Microstrip Line Filters 3319 EL2=L2Ro/Zh =1.2470*50/101.73 =0.613 rads (16-24) Combining 16-8 and 16-24, the line length of L2 and L6 is: L2=

GRF-3300 Manual 3320 x Lp: 1.6[8 mm, for SMA connector pin. pLoLoL1L2L3L4L5L6L7LoLoLpL Figure 16-6 16-2-3. Fine tune and Modification Just as menti

16 Microstrip Line Filters 3321 16-3. Coupled line Band Pass Filter Coupled line filter is a good choice if we want to design a band pass filter i

GRF-3300 Manual 3322 Figure 16-6 0.5dB Ripple N g1 g2 g3 g4 g5 g6 g7 g8 g9 g10 g11 1 0.6986 1.0000 2 1.4029 0.7071 1.9841 3 1.596

16 Microstrip Line Filters 3323 After that, we can use the follow equation to evaluate the even and odd mode of the characteristic impedance. &g

GRF-3300 Manual 3324 We still need to consider two issues: one is that the minimum practical distance is 0.5mm, and the other one that the impedance

16 Microstrip Line Filters 3325 2.0 2.2 2.4 2.6 2.8 3.0-25-20-15-10-50Coupled Line BPFInsertion Loss (dB)Frequency (GHz) before fine tune after fi

GRF-3300 Manual 3326 x y2=0.60527 x y23=1.01536 Figure 16-9 shows the structure of the filter. n ȏŤ y1 yn y1,2 yn-1,n y2 yn-1 y2,3 yn-2, n-1 y3

16 Microstrip Line Filters 3327 Now we can use the following equations to evaluate the line impedance. ciiiiciiyZZyZZ----2,,1,01,0  We get: 2

GRF-3300 Manual 3310 Theory When the signal frequency is high, for example 3GHz, the wavelength no longer becomes negligible as described in the gen

GRF-3300 Manual 3328 Summarizing the above results, we get x L1 =0.8x10.7mm, x L12=2.3x21.2mm, gap=0.9mm x L2=1x10.7mm x L23=2.3x21.2mm x Lo=2

16 Microstrip Line Filters 3329 Questions Question 1: What is the possible factor, other than the design of the filter itself, that affects implem

GRF-3300 Manual 3330 Experiments Insertion Loss Measurement 1 Objective: Implement a microstrip low pass filter. Refer to Figure 16-12 or R-11 modul

16 Microstrip Line Filters 3331 x TG output: on x TG normalization: on AmplitudeRefLevelIJ0 dBmOption TGTGLevel0 dBmOption TG0 dBmRefValueOption

GRF-3300 Manual 3332 Insertion Loss Measurement 2 Objective: Implement a microstrip line band pass filter. Refer to Figure 16-16 or T-1 module in th

16 Microstrip Line Filters 3333 Experiment Results Insertion Loss Measurement Chart 16-1 Measurement result of R-11 microstrip line low pass filt

GRF-3300 Manual 3334 Chart 16-3 Measurement result of T-6 microstrip line high pass filter insertion loss

16 Microstrip Line Filters 3311 The transmission line is often represented as shown in Figure 16-1. ),( tzi),( tzvzz' Figure 16-1, voltage

GRF-3300 Manual 3312 zOzOeIeIzIJJ )( (16-2) the complex propagation constant as: ))(( CjGLjRjZZEDJ  (16-3) The characteristic impedance

16 Microstrip Line Filters 3313 16-1-2. Lossless Line The above solution is intended for general transmission line including loss effects, where t

GRF-3300 Manual 3314 OLOLooZZZZVV * (16-12) When load mismatch occurs, not all generated power is delivered to the load. This “loss” is calle

16 Microstrip Line Filters 3315 LOinZZZ2 (16-19) Referring to 16-19 and redrawing Figure 16-3 as Figure 16-4, we get: LRinZ*4/O1Z0Z Figure 16-4

GRF-3300 Manual 3316 4. Find the L, C values according to the standard filter theory. 5. Convert the L, C to microstrip lines. 6. Construct and s

16 Microstrip Line Filters 3317 16-2-2. Solution Referring to Table 7-5, since Z/Zc=1.5 20dB attenuation is 20dB at 3GHz, the order becomes 7. Fro