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This paper introduces a novel reconfigurable SIW filter for 4G applications by using varactor diodes. This SIW filter consists of two floating islands with two via holes that connected with two varactor diodes. This method allows designing SIW filter with the tunable centre frequency with a constant absolute bandwidth. The filter is designed through the simulation on a standard printed circuit board...
In this paper, an efficient and simple design method for reconfigurable antenna by using a varactor diode is presented. This method allows designing the patch antenna with tunable centre frequency and a constant absolute bandwidth. The measured frequency response shows a good agreement with the simulated results. The antenna operating frequency range covers from 1.915 to 2.102 GHz. This investigation...
An integrated high selectivity microstrip wideband bandpass filter with tunable notch response is presented in this paper. The bandpass filter is designed using 7th order short circuited stub filter. Then, the first short circuited stub is replaced with two sections of open circuited stub to exhibit the transmission zeros at lower/higher stopband. The integration with notch filter is realized using...
An integrated suspended stripline structure with defected stripline structure to produce simultaneous bandpass and notch response is presented and implemented in this paper. The bandpass filter was designed with cascading lowpass and highpass and produced the finite transmission zeros. The integration of SSS bandpass filter with DSS produced high selectivity and attenuation of notch response at resonant...
A novel design of an integrated single-mode substrate integrated waveguide (SIW) bandpass filter and microstrip patch antenna is presented. To realize the concept, an SIW filter and a patch antenna were combined using cascaded and multilayer technologies on a microstrip structure. The design is based on the single-mode rectangular cavity structure using TE101 mode for SIW filter and TM010 mode for...
Integrated Power Amplifier (PA) and filter which is part of important component for Radio Frequency (RF) transmitter is designed using Adavance Design Simulation (ADS). The main aims of the design is to provide linear amplifier and filter at the center frequency of 2 GHz and biased at the conditions of class AB. GaAs transistor is used as an active device due to ability in operating at high frequencies...
This paper presents compact structure of bandstop filter with Defected Microstrip Structure (DMS) to produce a triple — band reject response. To prove the concept of the narrow notched DMS, the operating on centre frequency of 4.0 GHz is demonstrated and validated through simulation. The DMS structure is embedded in the middle of transmission lines in order to reject any undesired signals which may...
This paper presents the investigation based upon resonant circuit approach to characterize a single-, dual- and quadruple-mode microstrip patch antenna from the lowpass prototype lumped element. This theoretical method is used to determine the coupling value for quad mode antenna design in order to obtain maximum bandwidth. To validate this concept, the quad mode antenna based upon an equivalent circuit...
This paper presents the design of generalized Chebyshev lowpass filter (LPF) and integrated with Defected Stripline Structure (DSS) using Suspended Stripline Structure (SSS). The study involves circuit analysis to determine generalized Chebyshev responses with a transmission zero at finite frequency in order to produce a reduced number of elements values of prototype circuit. The LPF provides a cut-off...
This paper presents a new class of integrated rectangular Substrate Integrated Waveguide (SIW) filter and microstrip patch antenna for RF/microwave front-end subsystems. To validate this concept, the integrated microwave filter and antenna based upon a cascaded approach at center frequency of 2 GHz is demonstrated and verified through simulation and measurement. Experimental results show good agreement...
This paper presents the design of reconfigurable defected ground structure (DGS) resonator that can be integrated with ultrawide-band (UWB) microwave filter to produce bandpass and bandstop response simultaneously. The reconfigurable DGS is designed based upon coplanar waveguide (CPW) technology to exhibit bandstop characteristic at 3.5 GHz and 5.5 GHz using FR-4 on a 1.6 mm dielectric substrate thick...
This paper presents a low-loss of coaxial cavity bandpass filter with post-manufacturing tuning capabilities. A systematic filter development using the lowpass prototype as a starting point to produce 4th degreeChebyshevbandpass response is demonstrated. The coaxial cavity filter based upon TEM mode of propagation has the center frequency of 2.5 GHz and bandwidth of 168MHz. The insertion loss of 0...
This paper presents the investigation based upon the resonant circuit approach to characterize the rectangular microstrip patch antenna from the low-pass prototype lumped element. The physical layout of the rectangular microstrip patch antenna based on single-mode and dual-mode will be established. An improvement on bandwidth of the antenna can be achieved by increasing the number of modes. In the...
This paper presents the investigation and characterization of integrated microwave filter and antenna to reduce the overall physical volume for RF/ microwave front-end subsystems. This study focuses on the integrating of rectangular Substrate Integrated Waveguide (SIW) filter with rectangular microstrip patch antenna to produce filtering and radiating element in a single device. To proof the concept,...
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