Standard No.:	QJ A 1729-1996
English Name:	Semiconductor discrete device - Detail specification for silicon NPN low power switching transistor of Type 3DK
Chinese Name:	半导体分立器件 3DK103型NPN硅小功率开关晶体管详细规范
Chinese Classification:	V73    Spacecraft control and guidance system
Professional Classification:	QJ    Professional Standard - Aerospace
Implemented on:	1997-1-2
Status:	valid
Superseding:	QJ 1729-1989
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	210.0
Delivery:	via email in 1 business day

Test methods for aerospace antenna 1 Scope 1.1 Subject content This standard specifies the general requirements and detailed requirements of conventional test methods for electrical property of aerospace antenna products. 1.2 Application scope This standard is applicable to the electrical property test of missiles, rockets, satellites, spacecraft antennas and space ground antennas. 2 Normative references GJB 7 Safety limit for microwave radiation QJ 1947 Definitions of terms for antennas QJ 2359 Standard test procedures for antennas SJ 2534.10 Test procedures for antennas - Measurement of power gain and directivity 3 Definitions 3.1 antenna under test the antenna to be tested itself and relevant components together with it 3.2 antenna range a test site consisting of instruments, equipment and physical space that meet the requirements for measurement of radiation characteristics of antenna See QJ 1947 for other terms. 4 General requirements 4.1 Basic assumptions and requirements 4.1.1 Antenna under test The radiation characteristics of the antenna under test are measured in the antenna range. Therefore, the following assumptions are made: a. For purpose of this standard, it is assumed that the antenna under test is a passive, linear and reciprocal device;

1 Scope 1.1 Subject content 1.2 Application scope 2 Normative references 3 Definitions 4 General requirements 4.1 Basic assumptions and requirements 4.2 Antenna range 4.3 Test apparatus for the antenna range 4.4 Model antenna 4.5 Microwave protection 5 Detailed requirements 5.1 Pattern measurement 5.2 Phase measurement 5.3 Polarization measurement 5.4 Gain measurement 5.5 Directivity measurement 5.6 Electrical boresight measurement 5.7 Measurement of input impedance (voltage standing wave ratio) 5.8 Measurement of power capacity 5.9 Measurement of isolation between antennas 5.10 Measurement of electrical property of radome Additional explanation