Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 4493-6 (1982): Hollow metallic waveguides, Part 6: Rigidsquare waveguides [LITD 6: Wires, Cables, Waveguides andAccessories]

IS : 4493 ( Part VI ) - 1982

Indian Standard

SPECIFICATION FOR HOLLOW METALLIC WAVEGUIDES

PART VI RIGID SQUARE WAVEGUIDES

Microwave Components and Accessories Sectional Committee, LTDC 19

Chairman Refiresen t ing

*DR K. CHANDRA National Physical Laboratory ( CSIR), New Delhi

Members

DR V. K. ACRAWAL ( Alternnte to Dr K. Chandra )

SHRI R. K. ARORA Department of Electronics, New Delhi SHRI S. M. SHAKEEL ( Alkrnate )

DR R. S. ARORA Directorate General of Supplies and Disposals

SHRI D. R. CHANDRAN ( Alternate ) ( Inspection Wing ), New Delhi

SHRI N. CHANDRA~EKARAN Bharat Electronics Ltd, Bangalore DR (SHRIMATI) R. CHATTOPADHYA~A Indian Telephone Industries Ltd, Bangalore

SHRI H. S. ANANTHANARAYANA RAO ( Alie-rnate )

SHRI S. DESIKAMANI Directorate of Technical Develooment and Pro-

SHR~ D. DHANA~EKARAN ( Alternate ) duction ( Air ), Ministry of Defence, New Delhi

SHRI B. L. GUPTA Bhabha Atomic Research Centre, Bombay SHRI C. G. KHOT Railway Board ( Ministry of Railways ), New Delhi

SHRI H. M., AGARWAL ( Alternate ) DR S. P. KOSTA ISRO Satellite Centre (Department of Space ),

Bangalore SHRI SIHARAN DE ( Alternate )

DR R. C. KUMAR Central Electronics Engineering Research Institute ( CSIR ), Pilani

SHRI T. R. MEHTA Hindustan Aeronautics Ltd, Hyderabad SHRI G. RA~HAKRISHANAN ( Alternatc J

SHIU A. K. M~~HRA Directorate General of Civil Aviation, New Delhi SHRI S. C. DUGGAL ( Alternate )

SHRI I. D. PAUL KLB Electronics, New Delhi SHRI VIDYA SAGAR ( Alternate )

(Continued on page 2 )

*Dr K. Chandra chaired the meeting of this committee when the above mentioned standard was finalized.

0 Copyright 1983

INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyiiht Act ( XIV of 1957 ) and

reproduction in whole or in part by any means except with written permission of the

publisher shall be deemed to be an infringement of copyright under the said Act

IS : 4493 ( Part VI ) - 1982

( Continued from page 1 )

Representing

;~ApAPuT The Scientific Instrument Co Ltd, Allahabad . . Defence Electronic Research Laboratory [ Ministry

of Defence ( R & D ) 1, Hyderabad SHRI S. SUNDARAM (Alternate)

DR D. P. S. SETH Posts and Telegraphs Department, New Delhi SHRI V. L. VENKATRAMAN ( Alternate )

SHRI P. K. SHUKLA Ministry of Defence ( R & D ) ’ SHRI S. SNASUBRAMANIAN ( Alternate )

PROF R. V. S. SITARAM Tata Institute of Fundamental Research, Bombay SHRI P. B. TOLE ( Alternate )

DR G. P. SRIVASTAVA Department of Physics, Delhi University, Delhi DR PREM SWARUP Solidstate Physics Laboratory [ Ministry of Defence

( R & D ) 1. New Delhi WC CUR K. V. PADMANABHAN ( Altern& ) ’ -’

SHRI R. C. JAIN, Director General, IS1 ( Ex-ojicia Member ) Head ( Electronics )

SHRI PAVAN KUMAR Assistant Director ( Electronics ), IS1

3

IS : 4493 ( Part VI ) - 1982

Indian Standard

SPECIFICATION FOR HOLLOW METALLIC WAVEGUIDES

PART VI RIGID SQUARE WAVEGUIDES

0. FOREWORD

0.1 This Indian Standard ( Part VI ) was adopted by the Indian Standards Institution on 19 August 1982, after the draft finalized by the Microwave Components and Accessories Sectional Committee had been approved by the Electronics and Telecommunication Division Council.

0.2 This standard shall be used in conjunction with IS : 4493 ( Part I )- 1979*.

0.3 Different types of waveguides are being covered in a series of standards consisting of the following individual parts of IS : 4493:

Part I General requirements and tests Part II Ordinary rigid rectangular waveguides Part III Medium flat rigid rectangular waveguides Part IV Flat rigid rectangular waveguides Part V Rigid rectangular waveguides with circular outside cross-

section Part VI Rigid square waveguides Part VII Circular waveguides Part VIII Elliptical waveguides

0.4 While preparing this standard, assistance has been derived from the following :

a) IEC Pub 153-7 Hollow metallic waveguides: Part 7 Relevant specifications for square waveguides, issued by the International Electrotechnical Commission.

0.5 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expres- sing the result of a test, shall be rounded off in accordance with IS : 2-19601_. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

*Specification for hollow metallic waveguides: Part I General requirements and tests ( jir.st revirion ) .

tRules for rounding off numerical values ( revi.red ).

3

IS : 4493 ( Part VI ) - 1982

1. SCOPE

1.1 The standard ( Part VI ) specifies the requirements for rigid square waveguides for use in electronic and telecommunication equipment.

2. TERMINOLOGY

2.1 For the purpose of this standard, the terms and definitions given in IS : 1885 ( Part XIII/Set 2 )-1967* and IS : 4493 ( Part I )-1979t shall apply.

3. CLIMATIC CATEGORIES

3.1 Provisions-of 3 of IS : 4493 ( Part I )-1979f shall apply.

4. MATERIAL CONSTRUCTION AND WORKMANSHIP

4.1 Provisions of 4 of IS

5. DESIGNATION OF

5.1 Provisions of 6 of IS

6. MARKING

6.1 Provisions of 7 of IS

7. PACKAGING

7.1 Provisions of 8 of IS

: 4493 ( Part I )-19797 shall apply.

WAVEGUIDES

: 4493 ( Part I )-1979t shall apply.

: 4493 ( Part I )-19797 shall apply.

: 4493 ( Part I )-19797 shall apply.

8. DIMENSIONAL REQUIREMENTS

8.1 The outline and dimensions shall be in accordance with Fig. 1 and Table 1.

9. ELECTRICAL CHARACTERISTICS

9.1 .The electrical characteristics shall be as specified in Table 1.

10. CONDITIONS FOR TESTS

10.1 Provisions of 9.1 of IS : 4493 ( Part I )-I9797 shall apply.

*Electrotechnical vocabulary: Part XIII Telecommunication transmission lines and waveguides, Section 2 Microwave transmission lines and waveguides.

$Specification for hollow metallic waveguides: Part I General requirements and tests (Jirst revision ).

4

IS:4493(PartVI)-1982

FIG. 1 OUTLINE DRAWING

11. CLASSIFICATION OF TESTS

11.1 Provisions of 9.2 of IS : 4493 ( Part I )-1979* shall apply.

11.2 The schedule of type tests and requirements shall be in accordance with Table 2.

11.3 The schedule for acceptance tests shall be in accordance with Table 2 of IS : 4493 ( Part I )-1979”.

12. TECHNICAL INFORMATION

12.1 Frequency Range-The frequency range indicated in Table 1 is from 1.15 to 1.375 times the cut off frequency in the dominant mode. For any particular type of application, the working frequency range may be smaller or greater than the frequency range in the table.

*Specification for hollow metallic waveguides: Part I General requirements and tests (first reuision ) .

5

IS : 4493 ( Part VI ) - 1982

12.2 Theoretical Attenuation - The values given in Table 1 are for waveguides made of copper with standard resistivity po= 1.724 1 x 10-a ohm.m and in accordance with the formula given in 9.3.1 of IS : 4493 ( Part I )-1979*. For other materiah figure quoted shall be multiplied by :

Material Resistivity ohm. metres x 10-e

Mult$dy by

Silver ( 100 percent ) 1.56 0.98

Copper ( ETP of IS : 191-19671_ ) 1.72 1.00

Silver ( 7 * 5 percent copper ) 1.80 1.06

Aluminium ( 100 percent ) 2.83 1.30

Brass ( 90 percent copper ) 3.90 I.55

Magnesium ( 100 percent ) 4.60 1.68

Brass ( 70 percent copper ) 6.50 2.00

12.2.1 The maximum attenuation shall not exceed 1.3 times the value calculated from the formula mentioned above, at a frequency 1.3 times the cut off frequency.

*Specification for hollow metallic waveguides: Part I General requirements and tests (first revisioa ) .

$Specification for copper ( second wvih ).

6

IS : 4493 ( Part VI ) - 1982

TABLE 1 RIGID SQUARE WAVEGUIDES

( Clauses 8.1, 9.1,. 12.1 and 12.2 )

All dimensions in millimetres.

OUTSIDE CROSS-SECTION

r---- L_-__-7 INSIDE CROSS-SXCTION

r____---- -----7

ATTEXIJATION IN dB/m

Radius of Corner rs

r___h-__ _

(4) (5) (6)

48.000 +0*096 0.8 40.000 kO.080 36.000 TO.072 8:;

32’000 F0.064 0’8 30.000 kO.060 0.8 28.000 kO.056 0.8 26.000 kO.052 0’8 23.000 +0.046 19.500 io.039 ;:;

17’000 iO.034 0’4 15.000 kO.030 0’4

FREQUENCY RANGE IN GHz FOR

DOMINANT MODE

From To

(2) (3) (7) (8) (10) (11) (12) (13)

K%: 0.054 6 0’065 1 0.071 7 0.079 6

;:;;;9

0.137 0’ 168 0.203

Q41 Q49

gz”;

8;;

Q75 Q85

$:Y! Q130

3.59 4.29 4.31 5’15 4.79 5.73 5.39 6.44

2’03 52.060 2’03 44.060 2.03 40’060 2’03 36.060 2.03 34.060 1’625 31’250

1.0 1’5

;:; 1’5 1.5

1.0 1’5

3.12 4’060 3.75 4’872 4.16 5.413 4.68 6’090 4.99 6’496 5.35 6’960 5.76 7’495 ’ 6.52 8’473 7’68 9.993 8.82 11’46 9.99 12’99

0.027 3 0.035 8 0.042 0 0’050 1 0.055 2 0.061 2 0.068 4

5.75 6.87 6’16 7.36 6.63 7.93 7.50 8’96 8.84 10.57

10.14 12’12 11.49 13.74

tz 1.3 1.5

0’8 1.3

;:“8 ;:;

0’65 1.15 0’5 1.0

1.625 1.625 1.625 1,270

$2;

22’75 0.082 2 0’105 0.129 0.156

19.54 17.54 I.270

NOTE - The values of attenuation given in the above mentioned table are for 100 percent copper. For other materials these values can be calculated using the formula given below [see also 9.3 of IS : 4493 ( Part I )-1979* 1.

This formula does not apply for thinly plated surface: These values also can be evaluated by multiplying the values obtained for 100 percent copper by ( p/p0 ) where p0 is the resistivity of copper which is equal to 1.724 1 X 10-E ohm. metre and p is the resistivity of the material used. For guidance, multiplication factors for a few materials are given below:

0.421 [ (.f/fc J2 + 1 1 (f/h I)[ Wfc )* - 1 I*

where For other materials the figures quoted should be multiplied by:

Material Resisti& .Wdt$died 62 ohm. metre x 10-e

Silver 100 percent 1.56 0.98 Copper ( ETP )t 1,12 1.00 Silver ( 74 percent ) copper 1.80 1.06 Aluminium ( 100 percent ) 2.83 1.30 Brass ( 90 percent ) copper 3.90 I .55 Magnesium ( 100 percent ) 4’60 I.68 Brass ( 70 percent ) copper 6.50 2.00

PC = at tenuation,

p =resistivity of inside non-magnetic wall metal,

p,=resistivity of copper = 1.724 1 x IO-8 ohm. metre,

a = inside width in millimetres,

b =inside height in millimetres,

,h =cut-off frequency for H 149.9

a, ( ‘I’&,, ) mode= --a- GHz, and

f’ =frequency at which the attenuation is to be calculated.

*Specification for hollow metallic waveguides: Part I General requirements and tests (first revision). tPure high conductivity electrolytic tough pitch copper ( ETP ) conforming to IS : 191-1967 Specification for copper ( second reuision ).

. 7

TABLE 2 TEST SCHEDULE AND REQUIBBMBNTS

( czuuse 11.2 )

SL TEST No.

(1) (2)

1. Groufi 0 a) Visual examination

CLAUSE REF CONDITION IN IS : 4493

( PART I )-1979* TUT

(3) (4)

9.4.1 -

b) Dimensions 9.4.2 -

c) Bow

i) For component fabrication 9.4.3.1

ii) For system application

d) Twist

i) For component fabrication

9.4.3.2

9.4.4.1

ii) For system applications 9.4.4.1

e) Squareness of cut 9.4.5

2. First Group

a) Surface roughness

b) Scratches 9.4.6

3. Second Group

a) Internal stresses

,

-

-

9.4.8 Corner radius may not be included in the measure- ment

Examination for scratches shall be 150 mm from each end and at the middle of the length

9.4.9 The waveguide tube shall be cut by means of a saw. The cutting process should be carefully con- trolled so as to avoid distortion arising from the cutting; and the use of a fine high-speed saw is recommended

REQUIREMENTS

(5)

The waveguides shall be visually examined and condition, design, workmanship, finish and mark- ings shall be satisfactory. There shall be no burrs, cracks, pits or other irregularities of the surface. Both inner and outer surfaces shall have a clean bright appearance in accordance with current engineering practice and shall be free from oxidation.

The dimensions and tolerance thereon shall conform to values given in Table 1 read with Fig. 1

Provisions of 9.4.3.1 of IS : 4493 ( Part I )-1979* shall apply

Provisions of 9.4.3.2 of IS : 4493 ( Part I )-1979* shall apply

Provisions of 9.4.4.2 (a) of IS : 4493 ( Part I )-1979* shall apply

Provisions of 9.4.4.2 (b) of IS : 4493( Part I )-1979* shall apply

The departure from squareness of the end of any waveguide shall not exceed 0.25 mm for wave guides up to 16 mm maximum inside waveguide dimension in- clusive and O-4 mm per 25 mm for waveguides over 16 mm inside waveguide dimension

The surface roughness shall be measured as described in Appen- f17gt of IS : 4493 ( Part I )-

. The average interior surface roughness of the wave- guide shall not exceed the value shown in Table 3 of IS : 4493 (Part I )-1979*

Provisions of 9.4.6 of IS : 4493 (Part I )-1979* shall apply

After cutting, the cross-sectional dimensions of the tube shall still be within the specified toler- ances

*Specification for hollow metallic waveguides: Part I General requirements and tests (Jirst revision). ( Continued )

TABLE 2 TEST SCHEDULE AND REQUIREMENTS - Contd

SL TEST CLAUSE REF CONDITION REQUIREMENTS No. IN IS : ‘id93

(PART I )-1979* TOEFST (1) (2) (3) (4) (5)

b) Hardness 9.4.7 The waveguide tube shall The average of a minimum of six be tested for hardness at readings shall be within the both ends around the tolerances stated below:

4. Third Group a) Attenuation

5. Fourth Grouf~ a) Dry Heat

W

i) Visual examination

periphery The waveguide shall comply with

the following diamond pyramid hardness numbers, using a 10 kg load :

a) Copper b) Brass 70/30 c) Brass 90/10 d) Silver e) Aluminium

80to130 * 120 to 170 100 to 150 85 to 140

As specified in the contract

As for (a), (b) or (c) above as relevant

90 to 240

f) Lined

9) Copper electroformed

h) Magnesium -4s specified in the contract

9.3.1 and 5.1 Measured at 1.5 times the cut off frequency Ha, ( TEa, ) mode

As specified in Table 1

9.5.1 and 3.1 Afrer recovery under stand- ard atmospheric condi- tions, the following mea- surements shall be made

-

- - The waveguides shall be visually examined and condition, design, workmanship, finish and mark- ings shall be satisfactory. There shall be no burrs, cracks, pits or other irregularities of the surface. Both inner and outer surfaces shall have a clean bright appearance in accordance with current engineering prac- tice and shall be free from

ii) Bow

iii) Rectangularity of cross section

iv) Twist

b) Cold

c) Rapid change of temperature

9.43

9.4.2.1(e)

9.4.4.1

9.5.2 and 3.1

9.5.3 and 3.1

oxidation - The requirements shall be within

the limits specified in the stand- ard

- The requirements shall be as specified in 9.4.2.1(e) of IS : 4493 ( Part I )-1979*.

- The requirements shall be within the limits specified in the standard

- After recovery under standard atmospheric conditions measure- ments and requirements, specified as in dry heat test shall be applicab!e

Not less than 30 minutes After recovery under standard atmospheric conditions, mea- surements and reqmrements specified as in dry heat test shall be applicable

NOTE 1 - For waveguides used in aviation, the climatic category with dry heat temperature as + 1OOOC; cold temperature as -65°C and rapid change of temperature from -65°C to + 100°C would be applicable.

NOTE 2 - For waveguides used on ground equipment ( fixed or mobile ), the climatic category with dry heat temperature as + 100°C; cold temperature as -40°C and rapid change of temperature from -40°C to + 100°C would be applicable.

NOTE 3 - For waveguides used for general purpose in laboratory, the climatic category with dry heat temperature as + 85°C; cold temperature as - 10°C and rapid change of temperature from - 10°C to +85”C would be applicable.

*Specification for hollow metallic waveguides: Part I General requirements and tests (Jirst revision ).

tl

V

I

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