Topic
L band
About: L band is a research topic. Over the lifetime, 674 publications have been published within this topic receiving 4570 citations.
Papers published on a yearly basis
Papers
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01 Jan 1979
TL;DR: In this article, Weighting techniques for frequency sidelobe suppression are also discussed along with results from a 1233 MHz weighted ST-Quartz device at 1233 FlHz and a weighted STcut Quartz device at 2 GHz.
Abstract: Low lossSAW filtershavebeen u sedina remarkable number of system applications The frequency ranoe for low loss devices has been from 30 MHz to 440 MHz 1 to 2 GHz devices can be manufactured using h igher resolution fabrication techniques Results fromunweighted, lithium niobate, and STcut Quartzdevices at 1233 FlHz are presented Weighting techniques for frequency sidelobe suppression are also discussed along with results from a 1233 MHz weighted ST-Quartz device
8 citations
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01 Oct 2011
TL;DR: A new 12bit true single Core 1,5 GS/s ADC with 2,3 GHz Bandwidth, based on a 200 GHz SiGeC bipolar Technology is described, which enables the direct digitizing of 500MHz broadband arbitrary waveforms directly in the 2nd Nyquist region closer to the Antenna (L-Band), enabling the design of flexible and simplified Radar receiver system architectures.
Abstract: In advanced applications such as digital radar, Ultra Wide Bandwidth communications and software defined radio, the need for wide instantaneous bandwidth often drives system design decisions. Broadband 12 Bit ADC's (Analogue to Digital Converters) are key enabling components which open up new design opportunities for digital Receiver systems. In this regard, this paper describes a new 12bit true single Core 1,5 GS/s ADC with 2,3 GHz Bandwidth, based on a 200 GHz SiGeC bipolar Technology, which enables the direct digitizing of 500MHz broadband arbitrary waveforms directly in the 2nd Nyquist region closer to the Antenna (L-Band), enabling the design of flexible and simplified Radar receiver system architectures.
8 citations
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TL;DR: In this paper, the analysis and verification process of the L-band satellite communications repeater thought PCB and circuit EM analysis is presented. But the authors do not consider the performance degradation caused by various spurious components inside the satellite transponder, power conversion board, digital signal board, TM/TC board.
Abstract: This study is the analysis and verification process of the L-band satellite communications repeater thought PCB & circuit EM analysis. System performance can be vulnerable to various spurious inside the L-band satellite transponder, power conversion board, digital signal board, TM/TC board, such as control panels and blocks that are linked signal components when the winch is increased due to the noise component. So the whole system can cause performance degradation. PCB resonance analysis and EM simulation can be easily analyzed for a variety of optimal. Also, by setting the ports on the PCB, H/W designer wants to can easily analyze system.
8 citations
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01 Jan 2020
TL;DR: In this article, a combined L-band radio frequency (RF) amplifier which is implemented by combining two single-stage RF amplifiers in parallel is presented. And the combined amplifier achieves 175.4 W total output power, 14.74 dB gain, and efficiency 25% for a continuous wave (CW) input signal.
Abstract: This paper presents the design and development of a combined L-band radio frequency (RF) amplifier which is implemented by combining two single-stage RF amplifiers in parallel. The applications such as radar systems, satellite systems, and wireless communications, require a high output power that is limited by a single-stage RF amplifier. The Class-A single-stage RF amplifier in this paper provides 95 W output power for the frequencies of 1.2 GHz to 1.3 GHz. The output power can be increased by the combined two single-stage RF amplifiers. The Wilkinson power dividers with a 90 ̊ phase shifter are used in this paper. The prototype power divider is realized by using low-cost FR4 PCBs. The constructed power dividers working at a center frequency of 1.25 GHz have lower than 10 dB reflected coefficients at all ports. The transmitted coefficients of S21 and S31 are 3.61 dB and 3.55 dB, respectively. A relative phase difference between the two output ports is 90 ̊±1 ̊. The combined amplifier achieves 175.4 W total output power, 14.74 dB gain, and efficiency 25% for a continuous wave (CW) input signal.
8 citations