Antenna on microstrip line with orthogonally placed dielectric resonator

Single-element antenna that uses microstrip line as a feeder and cylindrical dielectric resonator orthogonally oriented relative to the line as a radiating element has been investigated. The complete mathematical model of proposed design consisting of a number of analytical expressions for main antenna characteristics is obtained and verified. The analytical relation for antenna return loss versus stub length and coupling coefficients of dielectric resonator with the feeding line and open space is derived. The assessment of the potential possibility and conditions of perfect antenna matching with feeding line is carried out. The influence of main parameters of a dielectric resonator antenna on its characteristics is examined. The numerical analysis of different antenna parameters proving the obtained analytical expressions is performed. The results of theoretical analysis are in good agreement with experimental data

Stripe delay filters

There are considered constructions of microsized stripe delay filters, which are realized on a basis of ceramic materials with high dielectric permittivity. Delay time of non-minimal phase filters is 7–12 ns at frequencies of 1900 MHz with relative bandwidth of 3.6–3.85%. Filters dimensions are comparable with ones used in portable communication devices. Dimensions of researched three-resonator filter at frequency of 1900 MHz are 8.4×5×2 mm with material dielectric permittivity εr = 92, and 5-resonator filter ones are 9.2×8.6×2 mm. Filters are different from traditional delay filters. Two filters of considered ones contain odd resonator number and the third one contains four resonators and it has two cross couplings. The basis of the filters is amount of step-impedance stripe resonators pairs located close to each others whose electromagnetic coupling behavior is capacitive. There are represented the results of frequency characteristics simulation for different delay filters

Stripe delay filters

Полный текст доступен на сайте издания по подписке: http://radio.kpi.ua/article/view/S002134701604004XThere are considered constructions of microsized stripe delay filters, which are realized on a basis of ceramic materials with high dielectric permittivity. Delay time of non-minimal phase filters is 7–12 ns at frequencies of 1900 MHz with relative bandwidth of 3.6–3.85%. Filters dimensions are comparable with ones used in portable communication devices. Dimensions of researched three-resonator filter at frequency of 1900 MHz are 8.4×5×2 mm with material dielectric permittivity εᵣ = 92, and 5-resonator filter ones are 9.2×8.6×2 mm. Filters are different from traditional delay filters. Two filters of considered ones contain odd resonator number and the third one contains four resonators and it has two cross couplings. The basis of the filters is amount of step-impedance stripe resonators pairs located close to each others whose electromagnetic coupling behavior is capacitive. There are represented the results of frequency characteristics simulation for different delay filters.Рассмотрены новые конструкции миниатюрных полосковых фильтров задержки, которые реализованы на керамических материалах с высокой диэлектрической проницаемостью. Время задержки в новых неминимально-фазовых фильтрах составляет 7–12 нс на частотах около 1900 МГц с относительной шириной полосы частот 3,6–3,85%. Размеры фильтров соизмеримы с размерами микроволновых керамических фильтров, используемых в портативных устройствах связи. Размеры исследованного в работе трехрезонаторного фильтра задержки на частоте 1900 МГц составили 8,4×5×2 мм при диэлектрической проницаемости материала εᵣ = 92, а 5-резонаторного фильтра — 9,2×8,6×2 мм. Фильтры отличаются от традиционных фильтров задержки. Два из рассмотренных фильтров содержат нечетное число резонаторов, а третий имеет четыре резонатора и обладает двумя перекрестными связями. Основу фильтров составляют пары близко расположенных друг к другу ступенчато-импедансных полосковых резонаторов, электромагнитная связь между которыми носит емкостной характер. Приведены результаты моделирования частотных характеристик различных фильтров задержки