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In view of the high instantaneous bandwidth requirement of modern electronic countermeasures equipment, a 6~18 GHz ultra wideband T/R module with instantaneous bandwidth of 4 GHz is designed in this study. The MCM(Multi Chip Module) and ultrawideband signal transmission technologies are used to realize the requirements of high integration, miniaturization and modularization of T/R components. The structure of T/R compoments, the index budget of transceiver channel, the simulation of broadband signal transmission characteristics and the design of electromagnetic compatibility are described in detail. The test results show that the T/R module has a good performance in the 12 GHz operating bandwidth, the transmit power is greater than 35 dBm, the receive gain is greater than 20 dB, the noise factor is less than 5 dB, and the total delay time is up to 762 ps. [ABSTRACT FROM AUTHOR]

Copyright of Electronic Components & Materials is the property of Electronic Components & Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper, the current development status and bottleneck problems of terahertz science and technology are presented. The emphasis of discussion is on research progress of the core component in terahertz circuits, monolithic integrated power amplifier. According to the kinds of base material in integrated circuit(IC) design, compound including InP and GaAs terahertz amplifier IC are compared with those made by silicon including bulk CMOS and SiGe. Basing on this category standard by material, the performances of terahertz amplifier IC are analyzed and concluded in the aspects of circuit topology and specifications.

This paper develop a high performance K-band Hair-Pin MMIC band-pass filter which is based on GaAs IPD technology. The measurement result shows that at the operation frequency of 19.5～21.3 GHz, the insertion loss of this filter is below 2.6 dB, the minimum insertion loss is 2.2 dB@20 GHz, and the return loss and group delay ripple of this filter is below -25 dB&50 ps in band. The test result is quite coincide with simulation. The size of the MMIC filter is only 2.96 mm×1.8 mm×0.1 mm, it has much less volume than the filter which is fabricated by traditional technology,and it is suite for the miniaturization trend of microwave device used in radar and communication system which has wide prospect of application.

Copyright of Electronic Components & Materials is the property of Electronic Components & Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A new variable gain amplifier which was based on Monolithic Microwave Integrated Circuit ( MMIC ) INA02186 . and the gain control chips VCA824 and HMC470 was designed. VCA824 was controlled by DAC with MCU and HMC470 by MCU, and they fulfilled the rough and fine adjustment, respectively. The amplifier had a splendid gain range from - 19 dB to 52 dB with a wide bandwidth of 20 MHz to 300 MHz, i. e. , a very high frequency ( VHF) band. The amplifier had the character of wide pass band, low noise and precious gain control. [ABSTRACT FROM AUTHOR]

Copyright of Telecommunication Engineering is the property of Telecommunication Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)