The diversity of space missions presents enormous challenges to the development of satellite ground TT&C station. The modular construction of equipment can bring about many improvements to space equipment construction. First, this paper analyzes the demands of space missions to find out the key points and connotations of satellite ground TT&C station. Second, the basic development elements of modular connotations, the capacity requirements of satellite ground TT&C station and the current status of equipment construction are analyzed, and the modular construction of satellite ground TT&C station is proposed. Finally, combined with the positive role of modular construction and development, suggestions for the modular construction of satellite ground TT&C station are presented, which can effectively support the modular construction and development of satellite ground TT&C station.

Radar communication integration is an effective solution to spectrum competition and electromagnetic interference. The integrated waveform determines the architecture and performance of the integrated system. This paper proposes a radar communication integrated waveform based on multi-frequency-band Chirp-BOK to solve the low communication rate issue in Chirp Binary Orthogonal Keying (Chirp-BOK). Furthermore, it designs modulation and demodulation methods based on Inverse Fast Fourier Transform(IFFT) and Fast Fourier Transform(FFT) to reduce system complexity. To tackle the high Bit Error Rate(BER) issue, an optimization method using a double-window approach to reduce the judgment frequency is proposed. The ambiguity function and Doppler performance of the multi-frequency-band Chirp-BOK are analyzed. Simulation results demonstrate that the multi-frequency-band Chirp-BOK not only enhances the communication rate but also reduces the BER, ensuring detection resolution and excellent Doppler tolerance.

With the continuous development of telemetry technology, there higher higher requirements for phased array beamfor-ming capabilities and anti-interference capabilities. Based on the iterative Fourier algorithm, this paper proposes a new twostage optimization algorithm to solve the spaceborne phased array beamforming problem. In the first stage, the iterative Fourier algorithm is improved by adding virtual array elements with zero excitation to supplement the array and increasing dynamic range constraints of the array element excitation, so that it can be used to achieve beamforming and low sidelobe requirements. In the second stage, the excitation with low sidelobe characteristics obtained in the previous stage is used as the constraint vector of the new beamforming algorithm, so as to improve the anti-interference performance of the phased array without changing the original response as much as possible. The experimental results show that the proposed two-stage optimization method can reduce the sidelobe level while beamforming, enhance the anti-interference performance of the array, and has high computational efficiency.

With the aim of enhancing the space-air-ground integrated telemetry and telecontrol capabilities of the shooting range and meeting the comprehensive measurement demands for high-altitude high-speed targets and low-altitude multiple targets, we propose an air-based multi-target integrated telemetry and telecontrol system scheme leveraging phased array antenna technology. The system employs a space-air-ground integrated three-dimensional architecture. It constructs a large-capacity information relay transmission node via the air-based platform, the onboard telemetry and telecontrol subsystem, and the data relay subsystem. This system possesses the functions of receiving and forwarding multi-target omnidirectional telemetry data and relaying high-bit-rate measurement information. It accommodates the requirements of rapid mobility in stationing within complex terrains such as plateaus and seas. Moreover, key technologies including conformal array antenna design, unit-level all-digital beamforming, and wideband data relay communication have been conquered, thus providing crucial support for the telemetry and telecontrol operations in the aero-weapon range.

The phased array wave spectrometer is a small incident angle real aperture radar in the Ku band that detects ocean waves. When detecting ocean waves, it obtains a one-dimensional ocean wave spectrum in that direction by accumulating the echoes in different directions illuminated by the antenna. When the radar ring scans a circle to obtain the two-dimensional wave spectrum results. During the echo accumulation time in a single direction, the observation geometry of the phased array wave spectrometer can be simplified to flying along a straight trajectory at a fixed squint angle. During this period, the movement of the platform and the bending of the wave front will cause range migration of the echo signal, resulting in a decrease in the detection accuracy of the phased array wave spectrometer. In response to this problem, this paper analyzes the range migration phenomenon that exists in the detection of phased array wave spectrometers, and proposes a correction algorithm for the range migration of phased array wave spectrometers. The algorithm is verified using airborne flight test data. Comparing the backscattering coefficient and two-dimensional wave spectrum obtained by the traditional inversion algorithm and the range migration correction inversion algorithm, and comparing the measurement results with the buoy measurement results respectively, the results show that the range migration correction algorithm can effectively improve the accuracy of the wave spectrum retrieved by the phased array wave spectrometer.

This paper presents the design and implementation of a multi-bus interface data recording device with high overload resistance, specifically developed to meet the data recording demands of aircraft operating in high-impact and high-overload environments. The device is centered around a Field-Programmable Gate Array (FPGA) and integrates three communication interfaces:1553B bus, Ethernet, and RS422, ensuring accurate and reliable signal acquisition across various data transmission rates. The application of key technologies such as multi-layer energy absorption structure design, encapsulation protection technology, miniaturized circuit design, and efficient storage modules significantly enhances the system's overload resistance and overall stability. Testing and verification have demonstrated that this device can operate stably in extreme overload environments, ensuring data integrity and system reliability.

Against the backdrop of the design of electronic devices tending towards lightweight, low-profile, and multi-target features, a novel near-field multi-focus beam synthesis approach is put forward based on a new two-dimensional tensor impedance surface. On this basis, a tensor impedance surface that radiates near-field multi-focus beams is designed to operate at 10 GHz with a thickness of merely 1.524 mm. This surface accomplishes the radiation of multi-focus beams in space and the free proportioning of dual-polarization components of the multi-focus beams, and the multi-target energy convergence efficiency can exceed 40% at a distance of 1.5 m. Its low-profile design, straightforward feed structure, and multi-target radiation characteristics endow it with excellent application prospects in lightweight electronic devices.

Substrate Integrated Waveguide (SIW) has been widely used in the design of microwave circuits and systems due to its low insertion loss and high-quality factor. However, compared to traditional microstrip lines, SIW has larger transverse dimensions, which limits its application in miniaturized and compact microwave circuits and systems. This paper proposes a SIW-SSPP hybrid circuit by integrating a three-dimensional SSPP structure composed of metallized blind vias and metal patches. Theoretical analysis of dispersion characteristics and full-wave electromagnetic simulations demonstrate that this SIW-SSPP integrated hybrid circuit can achieve a 30% reduction in transverse length and a 50% reduction in longitudinal length of the transmission line. Furthermore, by etching an orthogonal radiation structure on top of the SIW-SSPP hybrid circuit, a compact ultra-wideband circularly polarized leaky-wave antenna was designed. The results indicate that the antenna exhibits a return loss below -10 dB and an S₂₁ below -6 dB within the operating frequency band of 11.2 to 17 GHz. It achieves an axial ratio of less than 3 dB between 11.2 and 16.2 GHz. The antenna's gain ranges from 10 to 15 dBic. It also features continuous scanning performance from backward space (-27°) to forward space (+30°). This design method provides a new approach for the development and design of high-performance, compact microwave, millimeter-wave, and terahertz systems.

Tightly coupled phased array antenna is a crucial form of ultra-wideband phased array antenna, which mainly consists of radiating elements, coupling capacitors between adjacent radiating elements, a wide-angle impedance matching layer on the array surface, and a reflective ground beneath the array. Its working principle is to decrease the resonant frequency of dipoles and counteract the inductive effect of the ground via the coupling capacitance between units, thereby attaining a low-profile and ultra-wideband impedance matching. Employ an equivalent circuit in conjunction with a Smith chart to elucidate the impedance frequency characteristics and physical significance of the various components within a tightly coupled phased array antenna. The functions and roles of different components of the antenna are deeply analyzed, and the key issues are summarized to provide theoretical guidance for the design of tightly coupled phased array antenna. Domestic and foreign design cases are summarized to provide experience for the theoretical design and engineering practice of this type of antenna.

As the existing ray tracing algorithms exhibit low efficiency in indoor scenarios, this paper presents a novel ray tracing approach for computing the electromagnetic field within a building. Firstly, a matrix is incorporated to denote the visibility of all surfaces. Among all candidate rays between a pair of source and field points, the least likely ones are eliminated by the visibility matrix. The remaining rays are then analyzed using the conjugate gradient method to precisely determine the ray path. Subsequently, ray-object intersection tests are carried out, which are also expedited by the visibility matrix. Eventually, if the ray is present, the electromagnetic field is calculated via the uniform theory of diffraction (UTD). This new ray tracing algorithm can handle all types of rays, such as the reflected, diffracted, and refracted ones. Hence, it is more flexible compared to the image method. An example of a house demonstrates that it is more accurate and faster than WinProp in indoor scenarios.