Section 5. Directional Couplers. Introduction

Size: px

Start display at page:

Download "Section 5. Directional Couplers. Introduction"

Vernon Stafford
5 years ago
Views:

Section Directional ouplers Introduction t MDL, directional couplers have always received the engineering and manufacturing

Included in the MDL line are cross-guide couplers with a coupling aperture design that is exclusive with MDL broadwall, sidewall

couplers featuring a minimum directivity of 4 d over a full waveguide frequency band and, the most recent addition, ridged

1 Section Directional ouplers Introduction t MDL, directional couplers have always received the engineering and manufacturing attention due a major component. wide variety of types are offered, often tailored to specific applications. Included in the MDL line are cross-guide couplers with a coupling aperture design that is exclusive with MDL broadwall, sidewall and branchguide couplers that were designed using our own computer program waveguide loop couplers a line of high directivity couplers featuring a minimum directivity of 4 d over a full waveguide frequency band and, the most recent addition, ridged waveguide couplers. Our experienced design group is also prepared to modify one of our standard models or design an entirely new coupler for your special applications.

2 Ordering Information * Example: 90XT326-R-20P-1- MX. 2b MODEL NUMER oupling Direction Insert R for righthanded coupling. Omit R for lefthanded coupling. OUPLING DIRETION PRESSURIZED TERMINL FLNGES 90XT326-R-20P Pressurized for 20PSIG. Number indicates desired pressure For non-pressurized, omit numerals and "P". MTERIL Flange Termination - 3 Flanges & Load Flange Port 1 Port 2 Port 3 1 over over over 2 over over hoke 3 over hoke over 4 over hoke hoke hoke over over 6 hoke over hoke 7 hoke hoke over 8 hoke hoke hoke Flange Termination - 4 Flanges Flange Port 1a Port 2a Port 1b Port 2b 1 over over over over 2 over over over hoke 3 over over hoke over 4 over over hoke hoke over hoke over over 6 over hoke over hoke 7 over hoke hoke over 8 over hoke hoke hoke 9 hoke over over over 10 hoke over over hoke 11 hoke over hoke over 12 hoke over hoke hoke 13 hoke hoke over over 14 hoke hoke over hoke 1 hoke hoke hoke over 16 hoke hoke hoke hoke Material and Finish ode Material Finish luminum lloy No Finish opper lloy No Finish luminum lloy hromated D opper lloy Silver Plated E luminum lloy hromated and Painted lue F opper lloy Silver Plated and Painted lue G opper lloy admium Plated H opper lloy Silver Plated and Rhodium flashed L opper lloy Silver Plated, Rhodium flashed and Painted lue

3 rossguide ouplers MDL directional crossguide couplers, utilizing a new type of coupling aperture, exhibit high powerhandling characteristics and are excellent for flat coupling over a given bandwidth. When calibrated, these couplers also perform efficiently as secondary standards for attenuating by known factors. MDL crossguide couplers are organized by WR number waveguide designations. For specific applications, MDL can design couplers to meet critical requirements for mean coupling values and directivity over limited bandwidths. Type "N" and "SM" connectors can be supplied on the secondary arm output upon request overall dimensions remaining the same, or a standard adapter may be attached. Either left or right directions of coupling are available. Left coupling will be supplied as standard, unless otherwise specified. ROSSGUIDE OUPLERS 2a 1b 1a W/G MEHNIL SIZE STYLE MEN DIMENSIONS FREQ. MDL NO. OUPLING DIRET- MX. (INHES) RNGE MODEL OF (d) IVITY VSWR (GHz) NUMERS PORTS * (d MIN) 2b 2 WR28 28XT GHz 28XT to GHz 28XT XT XT XT WR42 42XT GHz 42XT to 26.0 GHz 42XT XT XT XT XT XT XT XT WR1 1XT GHz 1XT to GHz 1XT XT XT XT XT XT XT XT WR62 62XT GHz 62XT to 17.0 GHz 62XT XT XT XT XT XT XT XT MX. Right coupling indicated by white arrows Left coupling indicated by black arrows Variation 20 = +/-.d 30 = +/-.d 40 = +/-.4d 0 = +/-.3d 60 = +/-.3d Notes: *Tolerance all values +/- 1.0d 1 Variation = +/- 3d, 26.GHz to 39GHz 2 Variation = +/- 2.d, 26.GHz to 40GHz

4 ROSSGUIDE OUPLERS 1b 2a 2b a MX. Right coupling indicated by white arrows Left coupling indicated by black arrows Variation 20 = +/-.d 30 = +/-.d 40 = +/-.4d 0 = +/-.3d 60 = +/-.3d rossguide ouplers W/G MEHNIL SIZE STYLE MEN DIMENSIONS FREQ. MDL NO. OUPLING DIRET- MX. (INHES) RNGE MODEL OF (d) IVITY VSWR (GHz) NUMERS PORTS * (d MIN) WR7 7XT GHz 7XT to 14.0 GHz 7XT XT XT XT XT XT XT XT WR90 90XT GHz 90XT to 14.0 GHz 90XT XT XT XT XT XT XT XT WR XT ** GHz 102XT ** to GHz 102XT ** XT ** XT ** XT ** XT ** XT ** XT ** XT ** Notes: *Tolerance all values +/- 1.0d **1d from 7.0 to 7.GHz 4 Variation +/-.8d Variation +/-.6d 6 Variation +/-.d 7 Variation +/- 1.d 8 Variation +/- 1.0d 9 Variation +/- 1.4d

5 rossguide ouplers W/G MEHNIL SIZE STYLE MEN DIMENSIONS FREQ. MDL NO. OUPLING DIRET- MX. (INHES) RNGE MODEL OF (d) IVITY VSWR (GHz) NUMERS PORTS * (d MIN) WR XT GHz 112XT to GHz 112XT XT XT XT XT XT XT XT WR XT GHz 137XT to 8.20 GHz 137XT XT XT XT XT XT XT xT WR19 19XT GHz 19XT to 6.8 GHz 19XT XT XT XT XT XT XT XT ROSSGUIDE OUPLERS 1b 2a 2b a MX. Right coupling indicated by white arrows Left coupling indicated by black arrows Variation 20 = +/-.d 30 = +/-.d 40 = +/-.4d 0 = +/-.3d 60 = +/-.3d Notes: *Tolerance all values +/- 1.0d 6 Variation +/-.d 7 Variation +/- 1.d

6 ROSSGUIDE OUPLERS 1b 2a 2b a MX. Right coupling indicated by white arrows Left coupling indicated by black arrows Variation 20 = +/-.d 30 = +/-.d 40 = +/-.4d 0 = +/-.3d 60 = +/-.3d rossguide ouplers W/G MEHNIL SIZE STYLE MEN DIMENSIONS FREQ. MDL NO. OUPLING DIRET- MX. (INHES) RNGE MODEL OF (d) IVITY VSWR (GHz) NUMERS PORTS * (d MIN) WR XT GHz 187XT to.8 GHz 187XT XT XT XT XT XT XT XT WR XT GHz 229XT to 4.90 GHz 229XT XT XT XT XT XT XT XT WR XT GHz 284XT to 3.9 GHz 284XT XT XT XT XT XT XT XT W/G MEHNIL SIZE STYLE MEN DIMENSIONS FREQ. MDL NO. OUPLING DIRET- MX. (INHES) RNGE MODEL OF (d) IVITY VSWR (GHz) NUMERS PORTS * (d MIN) Double Ridge rossguide ouplers WRD-70 D70XT D70XT WRD-47 D47XT D47XT Notes: *Tolerance all values +/- 1.0d 4 Variation +/-.8d Variation +/-.6d

7 Loop ouplers MDL waveguide loop coupler cover the frequency spectrum from WR90 to WR2100, and are widely used in RF circuits requiring directional power injection or extraction. These units are available as uni- or bi-directional couplers. Modifications to the standard designs are available on request. W/G SIZE FREQ. RNGE (GHz) MIN OUPLING VLUE WITH UNI-DIRETIONL (d) ONNETORS (FIG) SME SIDE (FIG) WITH I-DIRETIONL ONNETORS ONE TOP/ ONE OTTOM WR to 70 90LT16 1* 90LT26 2* 90LT36 3* WR to LT16 1* 112LT26 2* 112LT36 3* WR to LT LT26 137LT36 6 WR to 70 19LT LT26 19LT36 6 WR to LT LT26 187LT36 6 WR to LT LT26 229LT36 6 WR to LT LT26 284LT36 6 WR to LT LT LT46 430LT6 6 WR to 70 60LT LT LT46 60LT6 6 (FIG) ELETRIL DT Frequency: andwidth to be specified. oupling Value: To be specified. oupling Sensitivity: Directivity: VSWR: Power: Output onnectors: pproximately +/- 1d for 20% bandwidth. 2d for 2% of the waveguide band 20d for 20% of the waveguide band 1d for coupling values < 30d for 20% of the waveguide band. Main arm: 1.0 max. typcial for coupling values greater than 30d. The main arm will handle approximately 90% of waveguide rating. The internal load in the loop will handle watts average power at 2. WR90 to 112 SM female WR137 to 2100 type N female. SM FEMLE SM FEMLE SM FEMLE SM FEMLE FIGURE 1 FIGURE 2 FIGURE 3 Flange faces equivalent to STD cover flange except tapped holes. TYPE "N" FEMLE TYPE "N" FEMLE TYPE "N" FEMLE FIGURE 4 FIGURE FIGURE 6 UNI-DIRETINL INPUT OUTPUT 1.0±.03 TYPE "N" (FEMLE) I-DIRETINL INPUT FWD. REV. OUTPUT W/G I.D. FIGURE 7 FIGURE 8

8 ranch Guide ouplers These waveguide directional couplers offer characteristics which cannot be met by cross-guide, multi-aperture or slot typle couplers, especially in the 6-12d coupling range. They are of very short length and can handle almost full waveguide peak-pulse power capacity. Full waveguide band-widths may be specified: but for flat coupling, the bandwidth should be limited to approximately 10 percent. omputer aided design for specified paramenters enables MDL to reduce design and maunfacturing time and assure optimum performance. Mean coupling can be held to a tighter tolerance than for other types of couplers. Directivity is 20d min. Repeatability in production is facilitated by new manufacturing techniques. VR. FROM MEHNIL DIMENSIONS FREQ. MDL MODEL NO. MEN MEN W/G RNGE OUPLING- OUPLING SIZE (GHz) STYLE 1 STYLE 2 STYLE 3 (d) (d) STYLE 1 STYLE 2 STYLE 3 WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± WR ±.3 ± ±.4 ± ±. ± *ross-guide couplers are available for loose coupling values only, and multi-aperture couplers are too lengthy for tight couplings. Short slot couplers, while capable of handling high power are usually available only in the 3. d range. With reduced bandwidths the directivity can be greater than 30 d. STYLE 1 STYLE 2 STYLE 2

9 roadwall couplers W/G VR. MEHNIL INPUT SIZE MEN FROM MEN DIMENSIONS TERMINL FREQ. MDL OUPLING OUPLING DIRET- (INHES) FLNGES RNGE MODEL (d) vs FREQ. IVITY STYLE EQUIVLENT (GHz) NUMERS * (d) (d min) * LGT. TO Multihole WR1 1T ± T ± T ± T ± T ± WR62 62T ± T ± T ± T ± T ± WR7 7T ± T ± T ± T ± T ± WR90 90T ± T ± T ± T ± T ± T ± WR T ± T ± T ± T ± T ± T ± T ± WR T ± T ± T ± T ± T ± T ± WR T ± T ± T ± T ± T ± *Style 1 not available with choke flange on input terminal 1F2 (1.13 x 1.31 cover flange with four dia. holes.) UG419/U UG166/U 7F22 (1.0x1.0- cover flanges with four 6-32 threads.) UG39/U, UG13/U except 8-32 threads UG1493/U except 8-32 threads UG1/U, UG138/U except 8-32 threads UG441/U, UG344/U RODWLL TERMINL #2 TERMINL #1 (INPUT) TERMINL #1 (INPUT) TERMINL #2 STYLE 1 STYLE 2 TERMINL #3 TERMINL #3 When ordering Style 2, contact factory for length.

10 MULTIHOLE OMPENSTED TERMINL # 2 TERMINL # 1 (INPUT) roadwall couplers Multihole ompensated MDL s broadwall compensated directional couplers feature minimum coupling variation with frequency making them ideal for use in leveling circuits and broadband power monitoring. In contrast to most broadwall couplers, in which variation from mean coupling is ±0. d over a waveguide bandwidth, MDL s new compensated directional couplers reduce variation from mean coupling to only ±0.2 to ±0.3 d. TERMINL # 3 W/G VR. MEHNIL INPUT SIZE MEN FROM MEN DIMENSIONS TERMINL FREQ. MDL OUPLING OUPLING DIRET- (INHES) FLNGES RNGE MODEL (d) vs FREQ. IVITY MIN SEOND EQUIV (GHz) NUMERS (d) (d min) RM RM LGT. TO WR62 62F ± 0.0 ± WR90 90F ± 0.40 ± F ± 0.40 ± F ± 0.40 ± WR F ± 0.40 ± UG419/U UG36/U UG13/U except 8-32 thread UG1493/U except 8-32 thread Terminal 1 (input) not available with choke flanges. MULTIHOLE HIGH DIRETIVITY Multihole High Directivity MDL high directivity couplers are made using broached waveguides. Walls on the waveguide are extremely thick to prevent changes in characteristics caused by physical distortion. The electrical design assures a minimum directivity of at least 4 d and typically 0 d over the entire band, making possible the design of high performance reflectometers: These couplers available with cover flanges only. Material aluminum only. W/G VR. MEHNIL SIZE MEN FROM MEN DIMENSIONS FREQ. MDL OUPLING OUPLING DIRETIVITY (INHES) RNGE MODEL (d) vs FREQ. (d min) (GHz) NUMERS (d) LGT. WR90 90T ± 0.40 ±

11 Narrow-wall couplers NRROW-WLL OUPLERS VR. MEHNIL FROM PEK DIMENSIONS INPUT MEN POWER TERMINL W/G FREQ. MDL MEN OUPLING MIN DIRET- (INHES) FLNGES SIZE RNGE MODEL OUPLING vs FREQ. RM IVITY EQUIV. (GHz) NUMERS (d) (d) (KW) (d min) LGT. TO TERMINL #3 Multihole WR S ± 0.7 ± S ± 0.7 ± S ± 0.7 ± S ± 1.0 Included in S ± 1.0 mean Inc S ± 1.0 coupling WR S106-1* 30 ± 1.0 Included in S116-1* 40 ± 1.0 mean coupling 112S126-1* 0 ± S ± 0.7 ± S ± 0.7 ± S ± 0.7 ± WR S ± S ± UG39/U UG13/U Main arm: UG1/U UG138/U Secondary arm: UG39/U UG13/U UG138/U UG1/U UG441/U UG344/U MIN RM TERMINL #2 SEONDRY RM TERMINL #1 Note: External detail may differ slightly. WR90 to WR137 *WR90 waveguide in the auxiliary arm. uxiliary arm load: 3 watts average.

12 6

Section 3. Rotary Joints. Introduction

Section 3. Rotary Joints. Introduction Section Rotary Joints Introduction For more than forty years, MDL has produced waveguide rotary joints and is one of the major suppliers in both domestic and overseas markets. Many of the larger military