Bipa Datta

Multi-resonant Slotted Microstrip Antenna for C, X and Ku-Band Applications

A compact slotted patch antenna with single layer, single feed is simulated in this paper. By cutting two unequal slots at the upper right and lower left corner from the conventional microstrip patch antenna, resonant frequency has been reduced drastically compared to a conventional microstrip patch antenna and also simulated antenna size has been reduced by 34.22% with an increased frequency ratio.

Twice-band irregular rectangular cut-in microstrip patch antenna for microwave communication

A single layer, single feed compact slotted patch antenna is thoroughly simulated in this paper. Resonant frequency has been reduced drastically by cutting two irregular rectangular slots from the conventional microstrip patch antenna. It is shown that the simulated results are in acceptable. More importantly, it is also shown that the differentially-driven microstrip antenna has higher gain of simulated 3.57 dBi at 9.75 GHz and 1.14 dBi at 13.40 GHz and beamwidth of simulated 163.510 at 9.75 GHz and 145.430 at 13.40 GHz of the single-ended microstrip antenna. Simulated antenna size has been reduced by 49.89% with an increased frequency ratio when compared to a Conventional microstrip patch antenna.

A Printed Microstrip Antenna for RADAR Communication

A single layer, single feed compact slotted patch antenna is thoroughly simulated in this paper. Resonant frequency has been reduced drastically by cutting two different slots. The first one is the combinations of two triangular and another rectangular slot at the upper right corner and rest is bilateral triangle at the lower left corner from the conventional microstrip patch antenna. Simulated antenna size has been reduced by 48.11% with an increased frequency ratio when compared to a Conventional microstrip patch antenna.

Dual-band slotted microstrip patch antenna design for application in microwave communication

A single layer, single feed compact slotted patch antenna suitable for dual-band operations is thoroughly simulated in this paper. Patch antenna is basically a low cost, light weight, medium gain and narrowband antenna and suited for short-range microwave application such as a feeding element for other antennas and in research institutes as a reference antenna, it can also be used at output of signal conducting circuit for receiving signals from MEMS. By loading properly arranged slots on a rectangular microstrip patch, dual frequency and broadband operations of a single feed rectangular patch is achieved to increase bandwidth performance of the antenna. The impedance bandwidths of 562.85 MHz with return loss -28.64 dB and 1.17 GHz with return loss -43.40 dB are obtained in the proposed design. And simulated antenna size has been reduced by 59.07% with an increased frequency ratio when compared to a conventional microstrip patch antenna. The characteristics of the designed structure are investigated by using MoM based electromagnetic solver, IE3D. The simple configuration and low profile nature of the proposed antenna leads to easy fabrication and make it suitable for the applications in microwave communication system.

Compact monopole patch antenna for X & Ku band microwave communication

This paper seeks to present an improved microstrip patch antenna design and presents the results of comparison with a conventional microstrip antenna. It focusses on simulation of monopole single feed slotted patch antenna operating in the X band and Ku band. Resonant frequency has been reduced drastically by four slots from the conventional microstrip patch antenna. The design is simulated by using the Method of Moment (MOM) based IE3D software.

Estimation of Slot Position for a Slotted Antenna

Compact microstrip patch antennas have become quite popular nowadays. With lesser form factor requirements and for multiband applications, slotted antennas have proved useful. This paper evaluates the merits of slot positioning with respect to a fixed feed point. The evaluation is based on antenna parameters like resonating frequency, return loss and bandwidth. The simulations are run for a triangular (Δ) and a V slot. Results show that output characteristic follows almost similar in nature to slot positions with respect to fixed feeding point, irrespective of the slot shape. It is found that a slot produces maximum signal bandwidth and gain when put near the feeding point.

Design and Development of Low-Level RF Digital Feedback Loop

A controlled synchrotron light source is a specialized particle accelerator, typically accelerating electrons required for scientific and technical purposes. To energize charged particles to the final energy and to compensate the synchrotron radiation loss, RF power is used. To do so, RF cavities are used and power to RF cavities is fed using high power amplifiers (like Klystron for Indus-2 and Tetrode tube for Indus-1, at RRCAT, Indore, MP, India). With the advancement in the field of programmable logical devices and the Hardware description language, digital RF feedback control system using FPGAs is adopted for providing better flexibility, reliability and stability. In phase (I) and quadrature phase, (Q) scheme is used here for extracting the amplitude and phase information about RF signal. By processing information, the EM field inside the RF cavity has stable amplitude control loop (ACL) and phase control Loop (PCL). A new, FPGA-based, digital, low-level RF system, based on an analog I/Q modulator and demodulator, is proposed here for development.