Introduction: Microstrip have been developed due to specific features: high Q factor, low mutual coupling (often used at high field MRI for parallel imaging), and radiation losses are significantly reduced (which enhances SNR). Balanced feeding of the microstrip preserves the electrical symmetry with respect to the strip center, making the probe invariant under different loading conditions (dif...

This paper presents the design and simulation of a 5GHz monolithic low-noise amplifier integrated with an active Balun. Intended to WLAN applications, the fully integrated circuit was implemented in a 0.18μm CMOS technology. The simulations, optimized to noise performance, gain and minimum differential phase and magnitude error, were performed with BSIM3 model. Circuit simulations present 23dB ...

Gain enhancement wideband end-fire antenna is proposed in this paper. The proposed antenna can achieve gain enhancement by loading novel artificial materials structures (Split-ring Resonators) in the end-fire direction while broad bandwidth is realized by using elliptic dipole elements and a microstrip to coplanar balun. The measurements show that the proposed antenna have around 5-8 dB gain in...

In this paper, wide band balanced antenna with enhanced bandwidth performance that covers the 850 to 3000 MHZ of Band, covering the GSM, UMTS, Bluetooth, GPS, & Wi-Fi applications is investigated[1-4]. This antenna was designed in HFSS which have low profile, linear phase and constant radiation pattern with proper return loss and resonant on multiple frequencies. This proposed antenna was then ...

A novel method of dielectric sample detection utilizing microwave coupled-line sensor has been presented. The proposed measurement setup composed of two identical baluns and coupled-line section covered by an unknown material has been analyzed and formulas allowing for calculation of effective permittivity have been derived along with simplified calibration procedure. The method allows for dete...

A candidate design for radiating single-ended, high-voltage, fast transient signals is to use a Half Impulse Radiating Antema. This design avoids the mismatch that sometimes occurs in designs that require a balun or geometry conversion. We consider here the design principles involved in this antenna, including the F/D ratio, and whether or not to offset the paraboloidal feed. In addition, we co...

An ULP back-channel receiver is presented that demodulates binary a FSK back-channel signal embedded in 5.8GHz IEEE 802.11a Wi-Fi OFDM packets. The architecture of the back-channel receiver employs a two-step downconversion where the first mixing stage downconverts using the 3rd harmonic of the LO for power efficiency. The LP-65nm CMOS receiver consumes 335μW with a sensitivity of -72dBm at a B...

In the present paper, design and analysis of a 2.4 GHz printed dipole antenna for wireless communication applications are presented. Measurements on return loss and radiation pattern of this antenna configuration are included in this investigation. The printed dipole is combined with the feeding structure of a microstrip via-hole balun and is fabricated on an FR-4 printed-circuit-board substrat...