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In this paper, a 24 GHz millimeter wave (mm-wave) short range radar system is presented. In the designed radar system, there is one transmitter and one receiver channel. The transmitter channel has +9 dBm output power and 24 GHz output carrier signal is modulated with 20 ns square wave by SPDT switch. At the receiver channel, there are two LNAs, which have totally 40 dB gain, a microstrip band pass...
In this paper, a quasi-horn antenna array, which is combination of 4 × 4 slot array and its flares, is designed for Ku band monopulse radiation. The slots are fed by waveguide power divider. In order to obtain sum and difference radiation pattern, a magic T is utilized end of the waveguide feeder. Slot dimensions and distance between each slot are adjusted and optimized to get high gain and low return...
In this paper front-end design for a Ka band milimeter wave (MMW) radar which consists of an antenna, a low noise amplifier (LNA) and a band pass filter is presented. The operation frequency of the designed system is between 24–25 GHz in Ka band. A high gain axially displaced elliptical (ADE) dual reflector antenna is employed on the antenna structure. ADE sub-reflector with 5 cm diameter is illuminated...
This paper presents ultra-wide band (UWB) TEM horn antennas and TEM horn-fed parabolic reflector designs., which are suitable for down-looking and forward-looking vehicle-mounted impulse GPR systems., respectively. On this scope., partial dielectric loaded., Vivaldi form and array configurations of the TEM horn structure are investigated., designed., simulated and measured. Vivaldi shaped TEM horn-fed...
In this work, a determinististic, efficient design methodology is put forward to design a wide-band, low-noise microstrip amplifier, where the microstrip widths, lengths {⃗W,⃗ℓ} of the input/ output matching networks are obtained accurately and fast for a substrate {εr, h, tanʴ} using the cost-effective 3D EM- based Support Vector Regression Machine (SVRM) microstrip model provided that ensuring the...
In this paper, an ultra-wideband microstrip bandpass filter (BPF) which operates from 2 GHz to 4.7 GHz, with high selectivity and wide rejection band is presented and experimentally verified. The filter is composed of microstrip lines with shorted stubs acting as a high pass filter (HPF) on top side and dumbbell shaped defected ground structures (DGSs) on bottom side acting as a low pass filter (LPF)...
This paper deals with ultra-wide band (UWB) TEM horn antenna types, which are suitable for hand-held and vehicle mounted impulse GPR systems. On this scope, conventional, dielectric loaded, Vivaldi form, multi-sensor adaptive and array configurations of the TEM horn structure are designed, simulated and measured. Vivaldi shaped TEM horn fed ridged horn and parabolic reflector antenna prototypes are...
In this paper, design of the input and output matching microstrip circuits subject to the transistor potential performance is completed to meet an ultra-wide band front-end requirements. For this purpose, the performance characterization of a microwave transistor is implemented to design a microstrip amplifier so that geometry of all the matching microstrip elements on a selected substrate (W, ℓ,...
In this letter, a partially dielectric-loaded double-ridged horn antenna (PD-DRHA) that operates at 1–18-GHz frequency band is proposed for ultrawideband applications. The partially dielectric loading technique using a small lens inward the aperture has been implemented to enhance the gain of the standard double-ridged horn antenna (DRHA), without changing the physical dimensions. Approximately 5...
This paper deals with ultra-wide band (UWB) TEM horn antenna types, which are suitable for hand-held and vehicle mounted impulse GPR systems. On this scope, conventional, dielectric loaded, Vivaldi form, multi-sensor adaptive, and array configurations of the TEM horn structure are designed, simulated and measured. The Vivaldi shaped TEM horn fed ridged horn antenna prototype is proposed as a novel...
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