## 1 Introduction  
Modern wireless transceivers operate in a spectrum-crowded environment due to numerous communication standards introduced to meet the different needs of end-users. The opportunistic utilization of the available spectrum is proposed to maximize the bandwidth usage and achieve a high data rate [1, 2]. Then, a broadband receiver solution for spectrum sensing applications is essential to achieve the opportunistic utilization of the valuable resource, also known as cognitive radio. The work in [3] proposed a frequency channelization receiver architecture as one of the attractive solutions to achieve an expeditious spectrum utilization. The channelization receiver system adopts both parallel and series channelization, which help relax the RF front-end requirements and achieve fast frequency spectrum analysis with high dynamic range. The channelization receiver requires a separate RF front-end solution. The broadband input signal branches into parallel RF front-ends with equal bandwidth. The receiver front-end presented in this paper is able to accommodate one of the parallel front-end signal paths, which translates a 30-40 GHz (Ka-band) RF input signal to DC-10 GHz IF signals while maintaining a good signal-to-noise ratio. The critical specification of the proposed receiver front-end is the 10 GHz bandwidth in both the RF and IF frequency range, which is hard to achieve at the same time. Thus, various techniquesto improve the operating bandwidth of each block are applied to the proposed receiver design. At the same time, the front-end has to provide low noise and high linearity requirements to have a wide dynamic range [3]. These requirements are satisfied with a newly proposed input matching network utilizing gate to drain feedback capacitance and a linear down-conversion mixer with current-reuse.  
The wireless receiver operating at the Ka-band frequency can be utilized in many applications. First of all, to support the high data rate needed in fifth generation (5G) communication, unused millimeter-wave (mm-wave) frequency range including Ka-band has become a very attractive candidate. The 5G transceiver operating at Ka-band was studied in many previous works as a result [4; 5; 6; 7]. Another application of the Ka-band frequency range is ultra wideband (UWB) automotive radar system. To achieve a resolution of a few centimeters, Ka-band is utilized in the receiver front-end of UWB short-range radar applications [8; 9]. Satellite communication systems is another example of utilizing the Ka-band frequency range while providing a smaller form-factor at the system level [10; 11].  
This paper is an extended version of the work presented in [12]. The detailed optimization methods to achieve broadband operation are presented. Unpublished evidence of the validity of the proposed receiver front-end at Ka-band frequency is provided in this work. The low noise amplifier (LNA) input matching condition for stable operation is given. The mixer bandwidth extension due to the peaking inductor is analyzed based on the analog filter theory and compared with one without the peaking inductor  
The organization of the paper is as follows. The system architecture is explained in Section 2. Section 3 describes the structure and design considerations of major building blocks to meet the broadband and high performance requirements. Measurement results are presented in Section 4, and concluding remarks are provided in Section 5.