1. Straight Sections

Transcription

1 Milan Chyba Gorkého 2174, Pardubice, Czech Republic tel , mob Waveguide Components

2 Table of Contents 1. Straight Sections 2. Waveguide Bends and Twists 3. Directional Couplers 4. Waveguide-Coaxial Adapters 5. Terminations 6. Horn Antennas 7. Attenuators 8. Standardised Waveguide Sizes

3 1. Straight Sections Waveguides enable RF energy transfer with low losses. Material brass, copper or aluminium. Standardised rectengular profiles are most frequently used. Other dimensions (low profile, circular, H, Pi) are availeble upon request

4 1. Straight Sections Designation MC284VU x L MC187VU x L MC137VU x L MC90VU x L MC62VU x L MC42VU x L MC28VU x L Length [mm] L WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency band [GHz] Flange IEC L

5 2. Waveguide Bends and Twists Bends and twists enable the line to match mechanical design requirements. Waveguide internal dimensions and low RF power reflections inide are maintained. Internal surfaces are silvered, external ones are painted.

6 2.1 Waveguide Bends 90, E-Plane Designation MC284VO MC187VO MC137VO MC90VO MC62VO MC42VO MC28VO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] SWR 2 5 Flange IEC a,b,c [mm] As negotiated a b a c b

7 2.2 Waveguide Bends 90, H-Plane Designation MC284VO MC187VO MC137VO MC90VO MC62VO MC42VO MC28VO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] SWR 2 5 Flange IEC a,b,c [mm] As negotiated a b a c b

8 2.3 Waveguide Twists 90 Designation MC284 VO23000 MC187 VO23000 MC137 VO23000 MC90 VO MC62 VO MC42 VO MC28 VO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] SWR 2 5 Flange IEC a,b,c [mm] As negotiated c b a

9 2.4 Multiple Bends

10 2.4 Multiple Bends Designation MC284 VO MC187 VO MC137 VO MC90 VO MC62 VO MC42 VO MC28 VO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] Flange IEC As negotiated

11 3. Directional Couplers Directional couplers enable to isolate a small part of RF energy from the main line to a side line. Standard coupling levels are -10 db, -20 db, -30 db, -40 db and -50 db. Internal surfaces are silvered, external ones are painted.

12 3. 1 Cross-Guide Couplers The most frequent application is in waveguide lines for a current signal measurenent or diagnostics. Coupling accuracy on the nominal frequency is db with variation db over the waveguide frequency band.

13 3. 1 Cross-Guide Couplers Designation MC284 SO MC187 SO MC137 SO MC90 SO MC62 SO MC42 SO MC28 SO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] Nominal Coupling [db] C = -10 db, -20 db, -30 db, -40 db or -50 db Directivity [db] SWR Flange IEC b a c

14 3.2 High Directivity Broadwall Couplers Enable precise laboratory waveguide measurements. Coupling accuracy on the nominal frequency is db with variation db over the waveguide frequency band.

15 3.2 High Directivity Broadwall Couplers Designation MC284SO MC187 SO MC137 SO MC90 SO MC62 SO MC42 SO MC28 SO WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] Nominal Coupling [db] 10 Directivity [db] 40 SWR Main Line 1.05 SWR Coupled Line a x b [mm] 1300 x x x x x x 47 Flange IEC a c

16 4. Waveguide-Coaxial Adapters Enables RF signal transition with minimum losses Standard design is probe-type adapter Inner surfaces are preserved by anticorrosive conductive layer, outer surfaces are painted

17 4. Waveguide-Coaxial Adapters Designation MC284 KV MC187 KV MC137 KV MC90 KV MC62 KV MC42 KV MC28 KV WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] SWR Flange IEC b a

18 5. Waveguide Terminations Are utilized as nonreflecitve terminations of waveguide lines. RF energy is transformed to termal one. Terminationes are designed either as lowpower (mostly for laboratory purposes) or high-power (radar devices, thermal energy radiation must be considered).

19 5.1 Low-power terminations 1 Power Load [W] IEC Flange SWR Frequency Band [GHz] WR28 WR42 WR62 WR90 WR137 WR187 WR284 WG MC28 MC42 MC62 MC90 MC137 MC187 MC284 Designation

20 5.2 High-power terminations Power Load [W] IEC Flange SWR Frequency Band [GHz] WR28 WR42 WR62 WR90 WR137 WR187 WR284 WG MC28 MC42 MC62 MC90 MC137 MC187 MC284 Designation

21 6. Horn Antennas Horn antennas transform waveguide line to a free space. Can delivered also as gain standards with enclosed calibration diagrams.

22 6. Horn Antennas Designation MC284 TA60000 MC187 TA60000 MC137 TA60000 MC90 TA60000 MC62 TA60000 MC42 TA60000 MC28 TA60000 WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequenc y Band [GHz] SWR Gain on fc [db] Aperture dimensions a x b [mm] 115 x x x x x x x 30 Length [mm] Flange IEC b c a

23 7. Attenuators Attenuators absorb RF power where known insertion loss is required Frequently are used as matching sections between generator and load, resonant curcuits etc. Overflowing power is abrorbed by a resistive layer. The layer is preserved by impregnation. Inner surfaces are preserved by anticorrosive conductive layer, outer surfaces are painted Standard attenuation values are -3 db, -6 db, -10 db and -20 db. Attenuation value slightly varies with frequency. Calibration curves are enclosed to attenuators. Calibration accuracy is db

24 7. Attenuators Designation MC284 MC187 MC137 MC90 MC62 MC42 MC28 WG WR284 WR187 WR137 WR90 WR62 WR42 WR28 Frequency Band [GHz] SWR Nominal Attenuation [db] L = 3, 6, 10 nebo 20 db Length a [mm] Flange IEC a c

25 Range Inner cross s. Inner cross s. De signations T olerance s Wall T hickness T heoret. Attne GH z inch mm ± mm mm db/ m a t fc, bra x x WG00 WR x x WG0 WR x x WG1 WR x x WG2 WR x x WG3 WR x x WG4 WR x x WG5 WR x x R14 WG6 WR x x R18 WG7 WR x x R22 WG8 WR x x R26 WG9A WR x x R32 WG10 WR x x R40 WG11A WR x x R48 WG12 WR x x R58 WG13 WR x x R70 WG14 WR x x R84 WG15 WR x x R100 WG16 WR x x R120 WG17 WR x x 7.90 R140 WG18 WR x x R180 WG19 WR x x R220 WG20 WR x x R260 WG21 WR x x R320 WG22 WR x x R400 WG23 WR x x R500 WG24 WR x x 1.88 R620 WG25 WR x x 1.55 R740 WG26 WR x x 1.27 R900 WG27 WR x x R1200 WG28 WR x x WG29 WR x x WG30 WR x x WG31 WR