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为满足用户的要求,日本着力研制了拿到车外仍可使用的可拆式移动电台。该电台由可拆分台及车载固定部分组成。根据可拆分台的发射功率的不同,分为 A 型和 B 型两种。该电台发、收功能齐全,和现在使用的汽车电话移动台相比,各方面都有较大进步,如元件,电路都小型化且实现了高密度装配。由于使用电池做电源,故力求降低各部分电路的功耗、以延长使用时间。本文具体介绍达种电台的频率合成器用的压控振荡器及频率合成器的电路组成、使用高介电常数材料的收发分频器、低压高效功率放大器,并介绍一下电池和各部分电路的高密度装配。
In order to meet the requirements of users, Japan has devoted itself to developing a removable mobile station which can still be used outside the vehicle. The station consists of a detachable car and a stationary part. According to the different splittable transmit power, divided into two types A and B. The radio transmission and reception functions are complete. Compared with the mobile phone mobile stations currently in use, the radio has made great progress in all aspects. For example, components and circuits are miniaturized and high-density assembly is achieved. As a result of the use of battery power, so try to reduce the power consumption of various parts of the circuit to extend the use of time. This article specifically describes the radio frequency synthesizer with frequency-controlled oscillator and frequency synthesizer circuit composition, the use of high dielectric constant-frequency transmitter and receiver, low-voltage high-efficiency power amplifier, and introduce the battery and the high part of the circuit Density assembly.