A Very Compact Novel Multi-Band BPF for Recent Mobile/Satellite Communication Systems

Abstract

Abstract-This paper presents a novel compact dual-tri bandpass microstrip filter employing meander and open stub loaded resonators. With the proposed technique, a simple transformation from dual-band to tri-band BPF is realized. A novel structure using embedded resonators is designed to generate multiband response. The main resonators control the low-band resonant frequency, the meander resonators control the two high-band resonant frequency and the open stub resonators control the high-band resonant frequency. The meander/stub resonators are embedded into the main spiral resonators, which makes the filter compact where its size is reduced by 64% compared to traditional filters. Passbands improvements and high selectivity are realized by the short circuit stubs which generate additional transmission zeros. The proposed filter has advantages such as low insertion loss, compact size and high selectivity. The theory is validated using the commercial full-wave solver CST 2012. Finally, the proposed structure is implemented and the measurement results are found to be in good agreement with the simulation results.

Accelerated multiobjective design of miniaturized microwave components by means of nested kriging surrogates

“…x (1) x (2) x (3) x (4) x (5) x (6) x (7) x (8) x (9) x (10) Objectives Table 1: x (1) (-), x (4) (ÁÁÁÁ), x (7) (---), and x (10) (-o-)…”

“…65 The designs x* (k) are the extreme Pareto-optimal designs that determine the span of the Pareto front. Using these, the lower and upper bounds for the design variables can be determined as l* = min {x* (1) ,…, x* (Nobj) } and u* = max{x* (1) ,…, x* (Nobj) }. 64 In most cases, the vast majority of the Pareto front is encompassed by the interval [l*,u*].…”

“…Miniaturization of microwave components has become an important design consideration due to the emergence of space‐limited applications, including mobile communications, wearable/implantable devices, sensors, biomedicine, body area networks, and so forth. Compact implementations of microwave circuits can be achieved in various ways; some of the popular techniques include utilization of high‐permittivity substrates, transmission line (TL) folding, employing the slow‐wave phenomenon, in particular, replacing conventional TLs by their shorter counterparts (eg, compact microwave resonant cells, CMRCs), or multilayer realizations (eg, low temperature cofired ceramic technology).…”

A Multiband Filter for Multistandards Wireless Communications Receivers

“…By referring to the literature, there are many papers dealing with multiband RF filters [3][4][5][6][7][8][9][10][11]. The designed multiband filters are based on several techniques for creating multiband response.…”

Switchable square ring bandpass to bandstop filter for ultra-wideband applications

“…Such issues include the frequency of operation, tuning speed of electronic component, and resulting size. The latest wireless communication systems require low cost, high controllability, and miniaturized circuits with enhanced responses [4–6].…”