Abstract

In modern satellite communication systems and airborne repeaters using an APAR, the receiving and transmitting modules usually consist of discrete phase shifters such as hybrid integrated circuits or monolithic circuits. In this paper, we consider an open-frame analog-digital phase shifter module with a 0°–360° phase change that allows ensuring the accuracy of setting the discrete phase to not more than 0.5° based on the domestic control UHF MIS varicaps. An original L-range analog-digital phase shifter with a 0°–360° phase change using a Lange bridge and phase-shifting cells based on four UHF MIS varicaps is proposed. The requirements for the type of volt-farad characteristic and the capacitance overlap coefficient of the MDP-varicap capacitance are determined. Even at the limiting (critical) UHF MIS-varicap frequency not higher than 15 GHz, the proposed scheme of the analog-digital phase shifter allows ensuring the phase shifter loss that is not greater than 1.5 dB in the L-band. The analog-digital phase shifter with a 0°–360° phase change was operated by the digital control board. An 8-bit DAC was used. The division value of the discrete control of the phase shifter is 1.4° at 256 DAC states. The obtained characteristics of the precision analog-digital phase shifter allow concluding on the propects of its use for solving synchronization problems of an active radio target simulator in testing synthetic aperture radars, as well as in the receiving and transmitting modules of a low-element APAR for the L-band.

中文翻译：

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具有0°–360°相变的精密L波段模数移相器

摘要

在使用APAR的现代卫星通信系统和机载转发器中，接收和发送模块通常由离散移相器组成，例如混合集成电路或单片电路。在本文中，我们考虑一种具有0°–360°相变的开放式模数移相器模块，该模块可确保根据家用控制UHF MIS varicaps将离散相位设置为不超过0.5°的精度。原始的L提出了一种使用Lange桥和基于四个UHF MIS varicaps的移相单元，具有0°–360°相变的高量程模数移相器。确定了对伏拉法特性的类型和MDP可变电容电容的电容重叠系数的要求。即使在极限（临界）UHF MIS可变电容频率不高于15 GHz时，所提出的模数移相器方案也可以确保L中的移相器损耗不大于1.5 dB-带。具有0°–360°相变的模数移相器由数字控制板操作。使用了一个8位DAC。在256个DAC状态下，移相器离散控制的分频值为1.4°。所获得的精密模数移相器的特性可以总结其用于解决有源无线电目标模拟器在测试合成孔径雷达以及低元件APAR的接收和发射模块中的同步问题的前景。对于L波段。