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The topology of balanced amplifiers has conventionally been one of good solutions for broadband amplifiers. Although feedback amplifiers have broader band characteristics than normal single-ended amplifiers, balanced amplifiers have been more popular with their additional technical advantages such as high output power, redundancy, and many productive applications in wireless systems. However, in most...
In this letter, a design for a dual-band negative group delay circuit (NGDC) using dual-plane U-shaped defected structures is presented. The center frequency and group delay (GD) time of each band are separately controlled by a defected microstrip structure (DMS) and a defected ground structure (DGS) with resistors connected across the DMS and DGS slots. To verify the design concept, the NGDC is designed,...
A channel cognitive super-regenerative receiver (SRR) system is proposed for low-power sensor network applications. Since the proposed system is designed based on the super-regeneration concept, the receiver is activated and yields the output demodulated signal only for valid incoming RF signals. While the super-regenerative oscillator (SRO) is designed with frequency tunability by a varactor diode,...
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