A zero intermediate frequency (zero‐IF) radio frequency (RF) transceiver with tunable operating frequency band is proposed in this article, which consists of a transmitter (Tx), a receiver (Rx). Both the Tx and the Rx can achieve broadband operation. By tuning the carrier signal frequency (f_c), the Tx and Rx can work in variable frequency band which is determined by f_c. Therefore, a transceiver with tunable operating frequency band was realized. A prototype of the designed transceiver was designed, simulated, manufactured, and measured. In the end, a zero‐IF RF transceiver with tunable frequency band during 2.3 to 3.5 GHz was implemented. The gain range of the Tx is −35 to 28 dB. The gain range of the Rx is 28 to 78 dB. For 16‐QAM signal with a symbol rate of 15 MHz, the error vector magnitude of proposed Tx and Rx are less than 7.8% and 5.0%, respectively.

中文翻译：

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具有可调工作频带的零中频RF收发器

本文提出了一种具有可调工作频带的零中频（zero-IF）射频（RF）收发器，该收发器由一个发送器（Tx），一个接收器（Rx）组成。Tx和Rx均可实现宽带操作。通过调谐载波信号频率（f _c），Tx和Rx可以在由f _c确定的可变频带内工作。因此，实现了具有可调谐工作频带的收发器。设计，仿真，制造和测量了设计的收发器的原型。最后，实现了具有2.3至3.5 GHz可调频带的零中频RF收发器。Tx的增益范围是-35至28 dB。Rx的增益范围为28至78 dB。对于符号率为15 MHz的16-QAM信号，建议的Tx和Rx的误差矢量幅度分别小于7.8％和5.0％。